[Federal Register Volume 87, Number 186 (Tuesday, September 27, 2022)]
[Rules and Regulations]
[Pages 58439-58445]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2022-20805]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-0287; Project Identifier MCAI-2020-01602-T;
Amendment 39-22142; AD 2022-17-04]
RIN 2120-AA64
Airworthiness Directives; De Havilland Aircraft of Canada Limited
(Type Certificate Previously Held by Bombardier, Inc.) Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain De Havilland Aircraft of Canada Limited Model DHC-8-400 series
airplanes. This AD was prompted by reports of broken P-clamps on the
pressure relief line and the motive flow line in the fuel tanks, and a
subsequent determination that certain service information lacked
instructions for maintaining appropriate clearance between certain fuel
tubes and their support brackets, and may also have led to incorrect
installation of certain TeflonTM sleeves. This AD was also
prompted by a determination that new or more restrictive airworthiness
limitations are necessary. This AD requires inspecting the motive flow
line, vent line, and related parts, and adding support or additional
clearance if necessary. This AD also requires inspection, and
replacement or relocation if necessary, of affected TeflonTM
sleeves on the vent line, and installation of TeflonTM
sleeves on the vent line at additional wing stations. This AD also
requires revising the existing maintenance or inspection
[[Page 58440]]
program, as applicable, to incorporate new or more restrictive
airworthiness limitations. The FAA is issuing this AD to address the
unsafe condition on these products.
DATES: This AD is effective November 1, 2022.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of November 1,
2022.
ADDRESSES: For service information identified in this final rule,
contact De Havilland Aircraft of Canada Limited, Dash 8 Series Customer
Response Centre, 5800 Explorer Drive, Mississauga, Ontario, L4W 5K9,
Canada; telephone 855-310-1013 or 647-277-5820; email
dehavilland.com">[email protected]dehavilland.com; internet dehavilland.com. You may view this
service information at the FAA, Airworthiness Products Section,
Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For
information on the availability of this material at the FAA, call 206-
231-3195. It is also available at www.regulations.gov by searching for
and locating Docket No. FAA-2022-0287.
Examining the AD Docket
You may examine the AD docket at www.regulations.gov by searching
for and locating Docket No. FAA-2022-0287; or in person at Docket
Operations between 9 a.m. and 5 p.m., Monday through Friday, except
Federal holidays. The AD docket contains this final rule, any comments
received, and other information. The address for Docket Operations is
U.S. Department of Transportation, Docket Operations, M-30, West
Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE,
Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Joseph Catanzaro, Aerospace Engineer,
Airframe and Propulsion Section, FAA, New York ACO Branch, 1600 Stewart
Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7366; email [email protected].
SUPPLEMENTARY INFORMATION:
Background
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued TCCA AD CF-2017-05R2, dated September
20, 2019 (CF-2017-05R2) (also referred to after this as the Mandatory
Continuing Airworthiness Information, or the MCAI), to correct an
unsafe condition for certain De Havilland Aircraft of Canada Limited
Model DHC-8-400, -401, and -402 airplanes. You may examine the MCAI in
the AD docket at www.regulations.gov by searching for and locating
Docket No. FAA-2022-0287.
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to certain De Havilland
Aircraft of Canada Limited Model DHC-8-400 series airplanes. The NPRM
published in the Federal Register on March 24, 2022 (87 FR 16661). The
NPRM was prompted by reports of broken P-clamps on the pressure relief
line and the motive flow line in the fuel tanks, and a subsequent
determination that certain service information lacked instructions for
maintaining appropriate clearance between fuel tubes and their support
brackets at wing stations -371.019 and -209.109 in the left-hand fuel
tank and wing stations 371.019 and 209.019 in the right-hand fuel tank.
This may also have led to incorrect installation of certain
TeflonTM sleeves. The NPRM was also prompted by a
determination that new or more restrictive airworthiness limitations
are necessary. The NPRM proposed to require inspecting the motive flow
line, vent line, and related parts, and adding support or additional
clearance if necessary. The NPRM also proposed to require inspection,
and replacement or relocation if necessary, of affected
TeflonTM sleeves on the vent line, and installation of
TeflonTM sleeves on the vent line at additional wing
stations. The NPRM further proposed to require revising the existing
maintenance or inspection program, as applicable, to incorporate new or
more restrictive airworthiness limitation. The FAA is issuing this AD
to address adverse impacts on the integrity of the electrical bonding
paths throughout the fuel line, which could lead to arcing between the
vent line and airplane structure, and could result in possible fuel
tank ignition in the event of a lightning strike. See the MCAI for
additional background information.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from the Air Line Pilots Association,
International, (ALPA), who supported the NPRM without change.
The FAA received additional comments from Horizon Air. The
following presents the comments received on the NPRM and the FAA's
response.
Request To Specify the Latest Revision of the Maintenance Manual
Horizon Air asked that paragraph (j) of the proposed AD be revised
to require Bombardier Q400 Dash 8 Maintenance Requirements Manual
(MRM), PSM 1-84-7, Revision 9, dated July 10, 2018. Horizon Air stated
that paragraph (j) of the proposed AD mandates incorporation of the
information specified in (Bombardier) Q400 Dash 8 Temporary Revision
(TR) ALI-0192 and TR ALI-0193, both dated April 24, 2018, into Section
4-28 Fuel System Limitation, or Section 5-00 Critical Design
Configuration Control Limitations, as applicable, of Part 2, of the
Bombardier Q400 Dash 8 Maintenance Requirements Manual, PSM 1-84-7.
Horizon Air added that the TRs have been incorporated and the
maintenance manual is currently at Revision 9.
The FAA agrees to clarify. Paragraph (j) of this AD requires
operators to incorporate ``the information specified in'' (Bombardier)
Q400 Dash 8 TR ALI-0192 and TR ALI-0193, both dated April 24, 2018. The
information is the same in both Bombardier Q400 Dash 8 Maintenance
Requirements Manual (MRM), PSM 1-84-7, Revision 9, dated July 10, 2018,
and TR ALI-0192 and TR ALI-0193. Therefore, if operators incorporate
Bombardier Q400 Dash 8 Maintenance Requirements Manual (MRM), PSM 1-84-
7, Revision 9, dated July 10, 2018, into the maintenance or inspection
program, as applicable, they are in compliance with paragraph (j) of
this AD (i.e., since the information specified in Bombardier Q400 Dash
8 Maintenance Requirements Manual (MRM), PSM 1-84-7, Revision 9, dated
July 10, 2018, contains the same information as TR ALI-0192 and TR ALI-
0193, both dated April 24, 2018, the operator is complying with the
requirement to incorporate the information specified in the TRs). The
FAA has not changed this AD in this regard.
Changes Made to This AD
The FAA has revised paragraph (h)(4) of this AD to more accurately
identify the actions specified in that paragraph as a method of
compliance for the actions required by paragraph (h)(2) of this AD.
The FAA has also revised paragraphs (h)(7) and (9) of this AD to
update the language providing credit for the actions required by those
paragraphs.
These changes have not changed the intent of these paragraphs.
[[Page 58441]]
Conclusion
The FAA reviewed the relevant data and determined that air safety
requires adopting this AD as proposed. Except for minor editorial
changes, and any other changes described previously, this AD is adopted
as proposed in the NPRM. None of the changes will increase the economic
burden on any operator. Accordingly, the FAA is issuing this AD to
address the unsafe condition on these products.
Related Service Information Under 1 CFR Part 51
De Havilland Aircraft of Canada Limited has issued the following
Bombardier service information.
Bombardier Service Bulletin 84-28-18, Revision B, dated
April 20, 2017, which describes procedures for increasing the hole size
in the collector tank partition wall, inspecting the motive flow line
for damage, and replacing the associated grommet and motive flow line.
Bombardier Service Bulletin 84-28-19, Revision D, dated
February 16, 2018, which describes procedures for replacing the
affected single nut plate brackets and standoffs at the affected left-
hand (LH) and right-hand (RH) wing stations on the motive flow line and
pressure relief line; inspecting the motive flow line and vent line at
certain wing stations in the fuel tanks to ensure that these fuel tubes
are adequately supported; and inspecting the fuel tubes to verify that
an appropriate clearance has been maintained between the fuel tubes and
their support brackets.
Bombardier Service Bulletin 84-28-24, dated November 27,
2017, which describes procedures for installing Teflon TM
sleeves on the vent line at the specified wing stations in the LH and
RH fuel tanks, inspecting the Teflon TM sleeve installation
on the vent line at those wing stations in the LH and RH fuel tanks,
and repositioning the Teflon TM sleeves.
Bombardier Service Bulletin 84-28-25, dated November 27,
2017, which describes procedures for inspecting the Teflon
TM sleeve installation on the vent line in the LH and RH
fuel tanks for correct installation and damage, and replacing and
repositioning the Teflon TM sleeves.
De Havilland Aircraft of Canada Limited has also issued the
following Bombardier service information, which describes procedures
for replacing the affected single nut plate brackets and standoffs on
the motive flow line and vent line at LH and RH wing stations. These
documents are distinct since they apply to different airplane
configurations.
Bombardier Repair Drawing 8/4-28-018, Issue 1, dated
October 30, 2017.
Bombardier Repair Drawing 8/4-28-018, Issue 2, dated June
12, 2018.
Bombardier Repair Drawing 8/4-28-018, Issue 3, dated June
21, 2018.
Bombardier Repair Drawing 8/4-28-018, Issue 4, dated July
27, 2018.
De Havilland Aircraft of Canada Limited has also issued the
following Bombardier service information, which describes fuel systems
limitations. These documents are distinct because they apply to
different airplane configurations.
Q400 Dash 8 Maintenance Requirements Manual (MRM) TR ALI-
0192, dated April 24, 2018.
Q400 Dash 8 MRM TR ALI-0193, dated April 24, 2018.
De Havilland Aircraft of Canada Limited has also issued the
following Bombardier service information, which describes new or more
restrictive airworthiness limitations for fuel tank systems. These
documents are distinct because they apply to different airplane
configurations.
Q400 Dash 8 Airplane Maintenance Manual (AMM) TR 28-145,
dated November 21, 2017.
Q400 Dash 8 AMM TR 28-146, dated November 21, 2017.
Q400 Dash 8 AMM TR 28-147, dated November 21, 2017.
Q400 Dash 8 AMM TR 28-148, dated November 24, 2017.
Q400 Dash 8 AMM TR 28-149, dated November 27, 2017.
Q400 Dash 8 Maintenance Task Card Manual (MTCM),
Maintenance Task Card 000-28-520-704 (Config A01), Revision 42,
Amendment 0002, dated November 21, 2017.
Q400 Dash 8 MTCM, Maintenance Task Card 000-28-620-704
(Config A01), Revision 42, Amendment 0002, dated November 21, 2017.
This service information is reasonably available because the
interested parties have access to it through their normal course of
business or by the means identified in the ADDRESSES section.
Costs of Compliance
The FAA estimates that this AD affects 52 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs for Required Actions *
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Labor cost Parts cost Cost per product Cost on U.S. operators
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Up to 93 work-hours x $85 per hour = Up to $7,862........... Up to $15,767.......... Up to $819,884.
Up to $7,905.
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* Table does not include estimated costs for revising the maintenance or inspection program.
The FAA has determined that revising the maintenance or inspection
program takes an average of 90 work-hours per operator, although the
FAA recognizes that this number may vary from operator to operator. In
the past, the FAA has estimated that this action takes 1 work-hour per
airplane. Since operators incorporate maintenance or inspection program
changes for their affected fleet(s), the FAA has determined that a per-
operator estimate is more accurate than a per-airplane estimate.
Therefore, the FAA estimates the total cost per operator to be $7,650
(90 work-hours x $85 per work-hour).
The FAA has received no definitive data on which to base the cost
estimates for the on-condition actions specified in this AD.
Authority for This Rulemaking
Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. Subtitle VII: Aviation Programs,
describes in more detail the scope of the Agency's authority.
The FAA is issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701: General requirements.
Under that section, Congress charges the FAA with promoting safe flight
of civil aircraft in air commerce by prescribing regulations for
practices, methods, and procedures the Administrator finds necessary
for safety in air commerce. This regulation is within the scope of that
authority because it addresses an unsafe condition that is likely to
exist or develop on products identified in this rulemaking action.
[[Page 58442]]
Regulatory Findings
This AD will not have federalism implications under Executive Order
13132. This AD will not have a substantial direct effect on the States,
on the relationship between the national government and the States, or
on the distribution of power and responsibilities among the various
levels of government.
For the reasons discussed above, I certify that this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Will not affect intrastate aviation in Alaska, and
(3) Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
0
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
0
2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive:
2022-17-04 De Havilland Aircraft of Canada Limited (Type Certificate
Previously Held by Bombardier, Inc.): Amendment 39-22142; Docket No.
FAA-2022-0287; Project Identifier MCAI-2020-01602-T.
(a) Effective Date
This airworthiness directive (AD) is effective November 1, 2022.
(b) Affected ADs
None.
(c) Applicability
This AD applies to De Havilland Aircraft of Canada Limited (type
certificate previously held by Bombardier, Inc.) Model DHC-8-400, -
401, and -402 airplanes, certificated in any category, serial
numbers (S/Ns) 4001, 4003, and subsequent.
(d) Subject
Air Transport Association (ATA) of America Code 28, Fuel System;
and 05, Time Limits/Maintenance Checks.
(e) Unsafe Condition
This AD was prompted by reports of broken P-clamps on the
pressure relief line and the motive flow line in the fuel tanks, and
a subsequent determination that certain service information lacked
instructions for maintaining appropriate clearance between certain
fuel tubes and their support brackets, and may also have led to
incorrect installation of certain TeflonTM sleeves. The
FAA is issuing this AD to address adverse impacts on the integrity
of the electrical bonding paths throughout the fuel line, which
could lead to arcing between the vent line and airplane structure,
and could result in possible fuel tank ignition in the event of a
lightning strike.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Definition
For the purposes of this AD, ``prohibited tasks'' are defined as
any task identified in paragraph (l) of this AD and any procedure or
task that specifies fuel tank access using non-manufacturer-approved
procedures.
(h) Modifications
(1) For airplanes having S/N 4001 and 4003 through 4525
inclusive: Within 6,000 flight hours or 36 months after the
effective date of this AD, whichever occurs first, increase the hole
size in the collector tank partition wall, inspect the motive flow
line for damage, and replace the associated grommet and motive flow
line, in accordance with paragraph 3.B. of the Accomplishment
Instructions of Bombardier Service Bulletin 84-28-18, Revision B,
dated April 20, 2017.
(2) For airplanes having S/N 4001 and 4003 through 4533
inclusive, on which Bombardier Service Bulletin 84-28-19, dated
August 16, 2016; or Revision A, dated November 4, 2016; has not been
done: Within 6,000 flight hours or 36 months after the effective
date of this AD, whichever occurs first, replace the affected single
nut plate brackets and standoffs at the affected left-hand (LH) and
right-hand (RH) wing stations on the motive flow line and pressure
relief line, in accordance with paragraphs 3.B. and 3.C. of
Bombardier Service Bulletin 84-28-19, Revision D, dated February 16,
2018.
(3) Accomplishing Bombardier Repair Drawing 8/4-28-018, Issue 1,
dated October 30, 2017; Issue 2, dated June 12, 2018; Issue 3, dated
June 21, 2018; or Issue 4, dated July 27, 2018; is a method of
compliance (MOC) only for the replacement of the affected single nut
plate brackets and standoffs on the motive flow line and vent line
at LH and RH wing stations Yw 209.019 and Yw 317.019 required by paragraph (h)(2) of this AD.
(4) Accomplishing Bombardier Repair Drawing 8/4-28-018, Issue 1,
dated October 30, 2017; Issue 2, dated June 12, 2018; Issue 3, dated
June 21, 2018; or Issue 4, dated July 27, 2018; prior to the
effective date of this AD, along with the replacement of the
affected single nut plate brackets and standoffs on the motive flow
line, vent line, pressure relief line, and scavenge line at LH and
RH wing stations Yw 209.019, Yw 317.019,
and Yw 371.019, is acceptable for compliance for the
actions required by paragraph (h)(2) of this AD.
(5) For airplanes having S/N 4001 and 4003 through 4533
inclusive, on which Bombardier Service Bulletin 84-28-19, dated
August 16, 2016; or Revision A, dated November 4, 2016; has been
done: Within 6,000 flight hours or 36 months after the effective
date of this AD, whichever occurs first, inspect the motive flow
line and vent line at wing stations -371.019 and 371.019 in the LH
and RH fuel tanks, respectively, to ensure that these fuel tubes are
adequately supported, and inspect the fuel tubes to verify that an
appropriate clearance has been maintained between the fuel tubes and
their support brackets, in accordance with paragraph 3.B., step
(13), and paragraph 3.C., of Bombardier Service Bulletin 84-28-19,
Revision D, dated February 16, 2018.
(6) For airplanes having S/N 4001 and 4003 through 4572
inclusive: Within 8,000 flight hours or 48 months after the
effective date of this AD, whichever occurs first, install
TeflonTM sleeves on the vent line at wing stations Yw
209.019 and Yw 371.019 in the LH and RH
fuel tanks, inspect the TeflonTM sleeve installation on
the vent line at wing stations Yw 317.019 in the LH and
RH fuel tanks, and if any sleeve is incorrectly installed,
reposition the TeflonTM sleeves before further flight, in
accordance with paragraphs 3.B. and 3.C. of the Accomplishment
Instructions of Bombardier Service Bulletin 84-28-24, dated November
27, 2017.
(7) Prior to accomplishment of the actions required by paragraph
(h)(6) of this AD, the applicable actions specified in paragraph
(h)(2) or (5) of this AD must be done. For airplanes on which
Bombardier Modification Summary (ModSum) 4Q113904 has been
accomplished prior to accomplishment of the actions required by
paragraph (h)(6) of this AD, no further action is required by this
paragraph.
(8) For airplanes having S/N 4001 and 4003 through 4575
inclusive: Within 8,000 flight hours or 48 months after the
effective date of this AD, whichever occurs first, inspect the
TeflonTM sleeve installation on the vent line in the LH
and RH fuel tanks for correct installation and damage, and if the
sleeves are incorrectly installed or damage is found, before further
flight, replace and reposition the TeflonTM sleeves, as
applicable, in accordance with paragraphs 3.B. and 3.C. of the
Accomplishment Instructions of Bombardier Service Bulletin 84-28-25,
dated November 27, 2017.
(9) Prior to accomplishment of the actions required by paragraph
(h)(8) of this AD, the applicable actions specified in paragraph
(h)(2) or (5) of this AD must be done. For airplanes on which
Bombardier ModSum 4Q113904 has been accomplished prior to
accomplishment of the actions required by paragraph (h)(8) of this
AD, no further action is required by this paragraph.
(i) Verification and Rework for Existing Maintenance Program
(1) For airplanes having S/N 4001 and 4003 through 4575
inclusive, on which the actions
[[Page 58443]]
required by paragraph (h)(6) or (8) of this AD have been done before
the effective date of this AD, or that have complied with paragraph
(m)(4) of this AD: Within 60 days after the effective date of this
AD, review the airplane maintenance records to confirm if any of the
prohibited tasks (defined in paragraph (g) of this AD) were
accomplished during or after compliance with paragraph (h)(6) or (8)
of this AD or paragraph (m)(4) of this AD.
(i) If any of the prohibited tasks were accomplished during or
after compliance with paragraph (h)(6) or (m)(4) of this AD, or if
it cannot be conclusively confirmed that they were not accomplished
during or after compliance with paragraph (h)(6) or paragraph (m)(4)
of this AD: Within 8,000 flight hours or 48 months after the
effective date of this AD, whichever occurs first, do the actions
required by paragraph (h)(6) of this AD and, as applicable, comply
with the requirements of paragraph (h)(7) of this AD.
(ii) If any of the prohibited tasks were accomplished during or
after compliance with paragraph (h)(8) of this AD, or if it cannot
be conclusively confirmed that they were not accomplished during or
after compliance with paragraph (h)(8) of this AD: Within 8,000
flight hours or 48 months after the effective date of this AD,
whichever occurs first, do the actions required by paragraph (h)(8)
of this AD and, as applicable, comply with the requirements of
paragraph (h)(9) of this AD.
(2) For airplanes having S/N 4573 and subsequent, with an
airplane date of manufacture, as identified on the identification
plate of the airplane, dated before the effective date of this AD:
Within 60 days after the effective date of this AD, review the
airplane maintenance records to confirm if any of the prohibited
tasks (defined in paragraph (g) of this AD) were accomplished on or
after the airplane date of manufacture. If any of the prohibited
tasks were accomplished on or after the airplane date of
manufacture, or if it cannot be conclusively confirmed that they
were not accomplished on or after the airplane date of manufacture,
within 8,000 flight hours or 48 months after the effective date of
this AD, whichever occurs first, obtain and follow instructions for
rework using a method approved by the Manager, New York ACO Branch,
FAA; or Transport Canada Civil Aviation (TCCA); or De Havilland
Aircraft of Canada Limited's TCCA Design Approval Organization
(DAO). If approved by the DAO, the approval must include the DAO-
authorized signature.
(j) Maintenance or Inspection Program Revision
For all airplanes: Within 30 days after the effective date of
this AD, revise the existing maintenance or inspection program, as
applicable, to incorporate the information specified in (Bombardier)
Q400 Dash 8 Maintenance Requirements Manual (MRM) Temporary Revision
(TR) ALI-0192 and TR ALI-0193, both dated April 24, 2018. The
initial compliance time for doing the tasks in (Bombardier) Q400
Dash 8 MRM TR ALI-0192, dated April 24, 2018, is at the applicable
time specified in paragraph (j)(1) or (2) of this AD, whichever
occurs later:
(1) Prior to the accumulation of 18,000 total flight cycles or
within 108 months since issuance of the original airworthiness
certificate or original export certificate of airworthiness,
whichever occurs first.
(2) Within 90 days after the effective date of this AD.
(k) No Alternative Actions, Intervals, or Critical Design Configuration
Control Limitations (CDCCLs)
After the existing maintenance or inspection program has been
revised as required by paragraph (j) of this AD, no alternative
actions (e.g., inspections), intervals, or CDCCLs may be used unless
the actions, intervals, and CDCCLs are approved as an AMOC in
accordance with the procedures specified in paragraph (n)(1) of this
AD.
(l) Maintenance Task Prohibitions
For all airplanes: As of the effective date of this AD, comply
with the prohibitions specified in paragraphs (l)(1) and (2) of this
AD.
(1) It is prohibited to use the Bombardier airplane maintenance
manual (AMM) tasks identified in paragraphs (l)(1)(i) through (v) of
this AD, which are specified in the Bombardier Q400 Dash 8 AMM, PSM
1-84-2, Revision 59 dated October 5, 2017, or earlier revisions of
these tasks. TRs including these AMM tasks, dated November 27, 2017,
or earlier, are also prohibited for use except as specified in
paragraph (l)(1)(i) through (v) of this AD.
(i) Task 28-10-00-280-806, Detailed Inspection of the
TeflonTM Sleeve on the Fuel Tank Vent Line, LH and RH
(FSL#284000-406), with the exception of (Bombardier) Q400 Dash 8 AMM
TR 28-145, dated November 21, 2017.
(ii) Task 28-12-06-000-801, Removal of the Outboard Vent Line,
with the exception of (Bombardier) Q400 Dash 8 AMM TR 28-146, dated
November 21, 2017.
(iii) Task 28-12-06-400-801, Installation of the Outboard Vent
Line, with the exception of (Bombardier) Q400 Dash 8 AMM TR 28-147,
dated November 21, 2017.
(iv) Task 28-12-01-000-801, Removal of the Inboard Vent Line,
with the exception of (Bombardier) Q400 Dash 8 AMM TR 28-148, dated
November 24, 2017.
(v) Task 28-12-01-400-801, Installation of the Inboard Vent
Line, with the exception of (Bombardier) Q400 Dash 8 AMM TR 28-149,
dated November 27, 2017.
(2) It is prohibited to use the Bombardier Q400 Dash 8
Maintenance Task Card Manual (MTCM) task cards identified in
paragraphs (l)(2)(i) and (ii) of this AD that are specified in the
Bombardier Q400 Dash 8 MTCM, PSM 1-84-7TC, Revision 42, dated
November 5, 2017, or earlier revisions or amendments of these task
cards. MTCM task card revisions or amendments dated November 21,
2017, or earlier, are also prohibited for use, except as specified
in paragraphs (l)(2)(i) and (ii) of this AD.
(i) Bombardier Q400 Dash 8 MTCM, Maintenance Task Card 000-28-
520-704 (Config A01), Revision 42, Amendment 0002, dated November
21, 2017.
(ii) Bombardier Q400 Dash 8 MTCM, Maintenance Task Card 000-28-
620-704 (Config A01), Revision 42, Amendment 0002, dated November
21, 2017.
(m) Credit for Previous Actions
(1) This paragraph provides credit for actions required by
paragraph (h)(1) of this AD, if those actions were performed before
the effective date of this AD using Bombardier Service Bulletin 84-
28-18, dated April 20, 2016; or Revision A, dated November 14, 2016.
(2) This paragraph provides credit for actions required by
paragraph (h)(2) of this AD, if those actions were performed before
the effective date of this AD using Bombardier Service Bulletin 84-
28-19, Revision B, dated July 28, 2017; or Revision C, dated
September 1, 2017.
(3) This paragraph provides credit for actions required by
paragraph (h)(5) of this AD, if those actions were performed before
the effective date of this AD using paragraphs 3.A. and 3.C and
paragraph 3.B., step (13) of Bombardier Service Bulletin 84-28-19,
Revision B, dated July 28, 2017; or Revision C, dated September 1,
2017.
(4) This paragraph provides credit for actions required by
paragraph (h)(6) of this AD, if, before the effective date of this
AD, the modsums identified in paragraph (m)(4)(i), (ii), or (iii) of
this AD were incorporated, and provided the conditions identified in
figure 1 to paragraph (m)(4) of this AD have been met.
[[Page 58444]]
[GRAPHIC] [TIFF OMITTED] TR27SE22.019
(i) Incorporation of both a modsum identified in paragraph
(m)(4)(i)(A) of this AD and a modsum identified in paragraph
(m)(4)(i)(B) of this AD.
(A) One of the modsums identified in paragraphs (m)(4)(i)(A)(1)
through (9) of this AD.
(1) Bombardier ModSum IS4Q2800023, Revision A, dated February 7,
2017.
(2) Bombardier ModSum IS4Q2800023, Revision B, dated April 11,
2017.
(3) Bombardier ModSum IS4Q2800023, Revision C, dated August 30,
2017.
(4) Bombardier ModSum IS4Q2800023, Revision D, dated October 11,
2017.
(5) Bombardier ModSum IS4Q2800023, Revision E, dated October 19,
2017.
(6) Bombardier ModSum IS4Q2800023, Revision F, dated October 20,
2017.
(7) Bombardier ModSum IS4Q2800023, Revision G, dated November
24, 2017.
(8) Bombardier ModSum IS4Q2800023, Revision H, dated November
29, 2017.
(9) Bombardier ModSum IS4Q2800023, Revision J, dated December
12, 2017.
(B) One of the modsums identified in paragraphs (m)(4)(i)(B)(1)
through (5) of this AD.
(1) Bombardier ModSum IS4Q2800025, Revision A, dated October 20,
2017.
(2) Bombardier ModSum IS4Q2800025, Revision B, dated November 3,
2017.
(3) Bombardier ModSum IS4Q2800025, Revision C, dated November
21, 2017.
(4) Bombardier ModSum IS4Q2800025, Revision D, dated November
23, 2017.
(5) Bombardier ModSum IS4Q2800025, Revision E, dated November
29, 2017.
(ii) Incorporation of both a modsum identified in paragraph
(m)(4)(ii)(A) of this AD and a modsum identified in paragraph
(m)(4)(ii)(B) of this AD.
(A) Bombardier ModSum IS4Q2800030, Revision A, dated November 3,
2017; or Bombardier ModSum IS4Q2800030, Revision B, dated November
21, 2017.
(B) One of the modsums identified in paragraphs (m)(4)(ii)(B)(1)
through (5) of this AD.
(1) Bombardier ModSum IS4Q2800025, Revision A, dated October 20,
2017.
(2) Bombardier ModSum IS4Q2800025, Revision B, dated November 3,
2017.
(3) Bombardier ModSum IS4Q2800025, Revision C, dated November
21, 2017.
(4) Bombardier ModSum IS4Q2800025, Revision D, dated November
23, 2017,
(5) Bombardier ModSum IS4Q2800025, Revision E, dated November
29, 2017.
(iii) Incorporation of a modsum identified in paragraphs
(m)(4)(iii)(A) through (C) of this AD.
(A) Bombardier ModSum IS4Q2800027, Revision A, dated October 27,
2017.
(B) Bombardier ModSum IS4Q2800027, Revision B, dated November 9,
2017.
(C) Bombardier ModSum IS4Q2800027, Revision C, dated November
15, 2017.
(n) Other FAA AD Provisions
The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, New
York ACO Branch, FAA, has the authority to approve AMOCs for this
AD, if requested using the procedures found in 14 CFR 39.19. In
accordance with 14 CFR 39.19, send your request to your principal
inspector or responsible Flight Standards Office, as appropriate. If
sending information directly to the manager of the certification
office, send it to ATTN: Program Manager, Continuing Operational
Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone 516-228-7300. Before using any
approved AMOC, notify your appropriate principal inspector, or
lacking a principal inspector, the manager of the responsible Flight
Standards Office.
(2) Contacting the Manufacturer: For any requirement in this AD
to obtain instructions from a manufacturer, the instructions must be
accomplished using a method approved by the Manager, New York ACO
Branch, FAA; or TCCA; or De Havilland Aircraft of Canada Limited's
TCCA Design Approval Organization (DAO). If approved by the DAO, the
approval must include the DAO-authorized signature.
(o) Related Information
(1) Refer to Mandatory Continuing Airworthiness Information
(MCAI) TCCA AD CF-2017-05R2, dated September 20, 2019, for related
information. This MCAI may be found in the AD docket at
www.regulations.gov by searching for and locating Docket No. FAA-
2022-0287.
(2) For more information about this AD, contact Joseph
Catanzaro, Aerospace Engineer, Airframe and Propulsion Section, FAA,
New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY
11590; telephone 516-228-7366; email [email protected].
(3) Service information identified in this AD that is not
incorporated by reference is available at the addresses specified in
paragraphs (p)(3) and (4) of this AD.
(p) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference (IBR) of the service information listed
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this service information as applicable to do
the actions required by this AD, unless this AD specifies otherwise.
(i) Bombardier Repair Drawing 8/4-28-018, Issue 1, dated October
30, 2017.
(ii) Bombardier Repair Drawing 8/4-28-018, Issue 2, dated June
12, 2018.
(iii) Bombardier Repair Drawing 8/4-28-018, Issue 3, dated June
21, 2018.
(iv) Bombardier Repair Drawing 8/4-28-018, Issue 4, dated July
27, 2018.
(v) Bombardier Service Bulletin 84-28-18, Revision B, dated
April 20, 2017.
[[Page 58445]]
(vi) Bombardier Service Bulletin 84-28-19, Revision D, dated
February 16, 2018.
(vii) Bombardier Service Bulletin 84-28-24, dated November 27,
2017.
(viii) Bombardier Service Bulletin 84-28-25, dated November 27,
2017.
(ix) Q400 Dash 8 Airplane Maintenance Manual (AMM) TR 28-145,
dated November 21, 2017.
Note 1 to paragraph (p)(2)(ix): The documents identified in
paragraphs (p)(2)(ix) through (xvii) of this AD do not specify a
publisher name; these documents were published by Bombardier.
(x) Q400 Dash 8 AMM TR 28-146, dated November 21, 2017.
(xi) Q400 Dash 8 AMM TR 28-147, dated November 21, 2017.
(xii) Q400 Dash 8 AMM TR 28-148, dated November 24, 2017.
(xiii) Q400 Dash 8 AMM TR 28-149, dated November 27, 2017.
(xiv) Q400 Dash 8 Maintenance Task Card Manual (MTCM),
Maintenance Task Card 000-28-520-704 (Config A01), Revision 42,
Amendment 0002, dated November 21, 2017.
(xv) Q400 Dash 8 MTCM, Maintenance Task Card 000-28-620-704
(Config A01), Revision 42, Amendment 0002, dated November 21, 2017.
(xvi) Q400 Dash 8 Maintenance Requirements Manual (MRM) TR ALI-
0192, dated April 24, 2018.
(xvii) Q400 Dash 8 MRM TR ALI-0193, dated April 24, 2018.
(3) For service information identified in this AD, contact De
Havilland Aircraft of Canada Limited, Dash 8 Series Customer
Response Centre, 5800 Explorer Drive, Mississauga, Ontario, L4W 5K9,
Canada; telephone 855-310-1013 or 647-277-5820; email
dehavilland.com">[email protected]dehavilland.com; internet dehavilland.com.
(4) You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 2200
South 216th St., Des Moines, WA. For information on the availability
of this material at the FAA, call 206-231-3195.
(5) You may view this service information that is incorporated
by reference at the National Archives and Records Administration
(NARA). For information on the availability of this material at
NARA, email [email protected], or go to: www.archives.gov/federal-register/cfr/ibr-locations.html.
Issued on August 4, 2022.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2022-20805 Filed 9-26-22; 8:45 am]
BILLING CODE 4910-13-P