
[Federal Register Volume 78, Number 151 (Tuesday, August 6, 2013)]
[Rules and Regulations]
[Pages 47543-47545]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2013-18771]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2013-0209; Directorate Identifier 2012-NM-127-AD; 
Amendment 39-17514; AD 2013-14-09]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc. Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

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SUMMARY: We are superseding airworthiness directive (AD) 2012-14-04 for 
certain Bombardier, Inc. Model DHC-8-100, -200, and -300 series 
airplanes. AD 2012-14-04 required replacing certain parking brake 
accumulators. This new AD retains this requirement. This new AD also 
requires installing restraint devices around the parking brake 
accumulator end caps. We are issuing this AD to prevent failure of a 
parking brake accumulator screw cap or end cap resulting in loss of the 
number 2 hydraulic system and damage to airplane structures, which 
could adversely affect the controllability of the airplane.

DATES: This AD becomes effective September 10, 2013.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of September 
10, 2013.
    The Director of the Federal Register approved the incorporation by 
reference of certain other publications listed in this AD as of August 
27, 2012 (77 FR 42956, July 23, 2012).

ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov or in person at the

[[Page 47544]]

U.S. Department of Transportation, Docket Operations, M-30, West 
Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., 
Washington, DC.

FOR FURTHER INFORMATION CONTACT: Cesar Gomez, Aerospace Engineer, 
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft 
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New 
York 11590; telephone (516) 228-7318; fax (516) 794-5531.

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to supersede AD 2012-14-04, which applies to the specified 
products. The NPRM was published in the Federal Register on March 26, 
2013 (78 FR 18257), and proposed to correct an unsafe condition for the 
specified products. Transport Canada Civil Aviation (TCCA), which is 
the aviation authority for Canada, issued Canadian Airworthiness 
Directive CF-2011-29R1, dated May 24, 2012 (the Mandatory Continuing 
Airworthiness Information, referred to after this as ``the MCAI''), to 
correct an unsafe condition for the specified products. The MCAI 
states:

    Seven cases of on-ground hydraulic accumulator screw cap or end 
cap failure have been experienced on CL-600-2B19 * * * aeroplanes, 
resulting in loss of the associated hydraulic system and high-energy 
impact damage to adjacent systems and structure. To date, the lowest 
number of flight cycles accumulated at the time of failure has been 
6991.
    Although there have been no failures to date on any DHC-8 
aeroplanes, similar accumulators to those installed on the CL-600-
2B19, Part Numbers (P/N)08-60162-001 and 08-60162-002 (Parking Brake 
Accumulator), are installed on the aeroplanes listed in the 
Applicability section of this [TCCA] directive.
    A detailed analysis of the systems and structure in the 
potential line of trajectory of a failed screw cap/end cap for the 
accumulator has been conducted. It has identified that the worst-
case scenarios would be the loss of number 2 hydraulic system, and 
damage to aeroplane structures.
    This [original TCCA] directive [which corresponds to FAA AD 
2012-14-04, Amendment 39-17118 (77 FR 42956, July 23, 2012)] gives 
instructions to determine the part number and serial number of the 
existing parking brake accumulator, and where applicable, replace 
the accumulator.
    Revision 1 of this [TCCA] AD mandates the installation of 
restraint devices around [all] the parking brake accumulator end 
caps to hold them in place in the event of an end cap failure.

Uncontained failure of the parking brake accumulator screw caps and/or 
end caps could result in loss of the number 2 hydraulic system, and 
damage to airplane structures, and could adversely affect the 
controllability of the airplane. You may obtain further information by 
examining the MCAI in the AD docket.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We received no comments on the NPRM (78 FR 18257 March 26, 
2013) or on the determination of the cost to the public.

Conclusion

    We reviewed the available data and determined that air safety and 
the public interest require adopting this AD as proposed-except for 
minor editorial changes. We have determined that these minor changes:
     Are consistent with the intent that was proposed in the 
NPRM (78 FR 18257 March 26, 2013) for correcting the unsafe condition; 
and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM (78 FR 18257 March 26, 2013).

Costs of Compliance

    We estimate that this AD will affect about 129 products of U.S. 
registry.
    The actions that were required by AD 2012-14-04, Amendment 39-17118 
(77 FR 42956, July 23, 2012), and retained in this AD take about 2 
work-hours per product, at an average labor rate of $85 per work-hour. 
Based on these figures, the estimated cost of the currently required 
actions is $170 per product.
    We estimate that it will take about 15 work-hours per product to 
comply with the new basic requirements of this AD. The average labor 
rate is $85 per work-hour. Required parts will cost about $5,302 per 
product. Where the service information lists required parts costs that 
are covered under warranty, we have assumed that there will be no 
charge for these parts. As we do not control warranty coverage for 
affected parties, some parties may incur costs higher than estimated 
here. Based on these figures, we estimate the cost of this AD to the 
U.S. operators to be $848,433, or $6,577 per product.

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.
    We are 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.

Regulatory Findings

    We determined that 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. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979);
    3. Will not affect intrastate aviation in Alaska; and
    4. 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.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this AD and placed it in the AD docket.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Operations office 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The AD docket contains this AD, the regulatory evaluation, 
any comments received, and other information. The street address for 
the Docket Operations office (telephone (800) 647-5527) is in the 
ADDRESSES section.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

[[Page 47545]]

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 removing airworthiness directive (AD) 
2012-14-04, Amendment 39-17118 (77 FR 42956, July 23, 2012), and adding 
the following new AD:

2013-14-09 Bombardier, Inc.: Amendment 39-17514. Docket No. FAA-
2013-0209; Directorate Identifier 2012-NM-127-AD.

(a) Effective Date

    This airworthiness directive (AD) becomes effective September 
10, 2013.

(b) Affected ADs

    This AD supersedes AD 2012-14-04, Amendment 39-17118 (77 FR 
42956, July 23, 2012).

(c) Applicability

    This AD applies to Bombardier, Inc. Model DHC-8-101, -102, -103, 
-106, -201, -202, -301, -311, and -315 airplanes, certificated in 
any category, serial numbers 003 and subsequent.

(d) Subject

    Air Transport Association (ATA) of America Code 32, Landing 
gear.

(e) Reason

    This AD was prompted by reports of hydraulic accumulator screw 
cap or end cap failure. We are issuing this AD to prevent failure of 
a parking brake accumulator screw cap or end cap resulting in loss 
of the number 2 hydraulic system and damage to airplane structures, 
which could adversely affect the controllability of the airplane.

(f) Compliance

    You are responsible for having the actions required by this AD 
performed within the compliance times specified, unless the actions 
have already been done.

(g) Retained Inspection and Replacement

    This paragraph restates the requirements of paragraph (g) of AD 
2012-14-04, Amendment 39-17118 (77 FR 42956, July 23, 2012), with no 
changes. Within 2,000 flight hours or 12 months after August 27, 
2012 (the effective date of AD 2012-14-04), whichever occurs first: 
Inspect to determine the part number (P/N) and serial number of the 
parking brake hydraulic accumulator, in accordance with the 
Accomplishment Instructions of Bombardier Service Bulletin 8-32-170, 
dated February 25, 2011. A review of airplane maintenance records is 
acceptable in lieu of this inspection if the part number and serial 
number of the parking brake hydraulic accumulator can be 
conclusively determined from that review.
    (1) For accumulators not having P/N 0860162001 or 0860162002: No 
further action is required by this paragraph.
    (2) For accumulators having P/N 0860162001 or 0860162002: Before 
further flight, do the applicable actions specified in paragraphs 
(g)(2)(i) and (g)(2)(ii) of this AD.
    (i) If the serial number is listed in the table in paragraph 
3.B.(2) of Bombardier Service Bulletin 8-32-170, dated February 25, 
2011: No further action is required by this paragraph.
    (ii) If the serial number is not listed in the table in 
paragraph 3.B.(2) of Bombardier Service Bulletin 8-32-170, dated 
February 25, 2011: Within 2,000 flight hours or 12 months after 
August 27, 2012 (the effective date of AD 2012-14-04, Amendment 39-
17118 (77 FR 42956, July 23, 2012)), whichever occurs first, replace 
the accumulator with a new non-suspect accumulator, in accordance 
with the Accomplishment Instructions of Bombardier Service Bulletin 
8-32-172, dated March 15, 2011.

(h) Retained Parts Installation Prohibition

    This paragraph restates the requirements of paragraph (h) of AD 
2012-14-04, Amendment 39-17118 (77 FR 42956, July 23, 2012), with no 
changes. As of August 27, 2012 (the effective date of AD 2012-14-
04), no person may install a parking brake accumulator, P/N 
0860162001 or 0860162002 with a serial number that is not listed in 
the table in paragraph 3.B.(2) of Bombardier Service Bulletin 8-32-
170, dated February 25, 2011, on any airplane.

(i) New Requirement of This AD: Install Restraint Devices on All 
Airplanes

    Within 6,000 flight hours or 36 months after the effective date 
of this AD, whichever occurs first: Install restraint devices around 
the parking brake hydraulic accumulator end caps by incorporating 
Bombardier ModSum 8Q101901, in accordance with the Accomplishment 
Instructions of Bombardier Service Bulletin 8-32-169, Revision A, 
dated December 16, 2011.

(j) Credit for Previous Actions

    This paragraph provides credit for actions required by paragraph 
(i) of this AD, if those actions were performed before the effective 
date of this AD using Bombardier Service Bulletin 8-32-169, dated 
November 25, 2011, which is not incorporated by reference in this 
AD.

(k) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York Aircraft Certification Office (ACO), ANE-170, 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 local Flight 
Standards District Office, as appropriate. If sending information 
directly to the ACO, send it to ATTN: Program Manager, Continuing 
Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite 
410, Westbury, NY 11590; telephone 516-228-7300; fax 516-794-5531. 
Before using any approved AMOC, notify your appropriate principal 
inspector, or lacking a principal inspector, the manager of the 
local flight standards district office/certificate holding district 
office. The AMOC approval letter must specifically reference this 
AD.
    (2) Airworthy Product: For any requirement in this AD to obtain 
corrective actions from a manufacturer or other source, use these 
actions if they are FAA-approved. Corrective actions are considered 
FAA-approved if they are approved by the State of Design Authority 
(or their delegated agent). You are required to assure the product 
is airworthy before it is returned to service.

(l) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) Canadian Airworthiness Directive CF-2011-29R1, dated May 24, 
2012, for related information. This MCAI may be found in the AD 
docket on the Internet at http://www.regulations.gov.
    (2) Service information identified in this AD that is not 
incorporated by reference may be obtained at the address specified 
in paragraph (m)(5) of this AD.

(m) 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 the AD specifies otherwise.
    (3) The following service information was approved for IBR on 
September 10, 2013.
    (i) Bombardier Service Bulletin 8-32-169, Revision A, dated 
December 16, 2011.
    (ii) Reserved.
    (4) The following service information was approved for IBR on 
August 27, 2012 (77 FR 42956, July 23, 2012).
    (i) Bombardier Service Bulletin 8-32-170, dated February 25, 
2011.
    (ii) Bombardier Service Bulletin 8-32-172, dated March 15, 2011.
    (5) For service information identified in this AD, contact 
Bombardier, Inc., Q-Series Technical Help Desk, 123 Garratt 
Boulevard, Toronto, Ontario M3K 1Y5, Canada; telephone 416-375-4000; 
fax 416-375-4539; email thd.qseries@aero.bombardier.com; Internet 
http://www.bombardier.com.
    (6) You may review copies of the service information at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. 
For information on the availability of this material at the FAA, 
call 425-227-1221.
    (7) 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, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued in Renton, Washington, on July 5, 2013.
Jeffrey E. Duven,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2013-18771 Filed 8-5-13; 8:45 am]
BILLING CODE 4910-13-P


