
[Federal Register Volume 77, Number 120 (Thursday, June 21, 2012)]
[Proposed Rules]
[Pages 37337-37340]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2012-15166]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2012-0643; Directorate Identifier 2011-NM-190-AD]
RIN 2120-AA64


Airworthiness Directives; Fokker Services B.V. Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

[[Page 37338]]


ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to supersede an existing airworthiness directive 
(AD) that applies to certain Fokker Services B.V. Model F.28 Mark 0070 
and 0100 airplanes. The existing AD currently requires performing a 
detailed visual inspection for cracks of the pistons on the main 
landing gear (MLG), and replacing the affected pistons if necessary. 
Since we issued that AD, a new modification has been developed to 
safeguard the integrity of the MLG assembly and improve surface 
protection of the affected area of the MLG piston. This proposed AD 
would also require modifying the MLG by installing a piston containing 
a certain part number, and revising the aircraft maintenance program. 
We are proposing this AD to prevent MLG failure, possibly resulting in 
loss of control of the airplane during the landing roll-out.

DATES: We must receive comments on this proposed AD by August 6, 2012.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: (202) 493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE., Washington, DC 20590.
     Hand Delivery: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE., Washington, DC, between 9 a.m. and 5 p.m., Monday 
through Friday, except Federal holidays.
    For Fokker service information identified in this proposed AD, 
contact Fokker Services B.V., Technical Services Dept., P.O. Box 231, 
2150 AE Nieuw-Vennep, the Netherlands; telephone +31 (0)252-627-350; 
fax +31 (0)252-627-211; email 
technicalservices.fokkerservices@stork.com; Internet http://www.myfokkerfleet.com. For Goodrich service information identified in 
this proposed AD, contact Goodrich, 1400 South Service Road, West 
Oakville, L6L 5Y7, Ontario, Canada, telephone +1-905-827-7777; fax +1-
905-825-1583; Internet http://www.goodrich.com/TechPubs. You may review 
copies of the referenced service information at the FAA, Transport 
Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington. For 
information on the availability of this material at the FAA, call 425-
227-1221.

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 proposed 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. Comments will be available in the AD docket 
shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Tom Rodriguez, Aerospace Engineer, 
International Branch, ANM-116, Transport Airplane Directorate, FAA, 
1601 Lind Avenue SW., Renton, Washington 98057-3356; telephone 425-227-
1137; fax 425-227-1149.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposed AD. Send your comments to an address 
listed under the ADDRESSES section. Include ``Docket No. FAA-2012-0643; 
Directorate Identifier 2011-NM-190-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of this proposed AD. We 
will consider all comments received by the closing date and may amend 
this proposed AD based on those comments.
    We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this proposed AD.

Discussion

    On January 31, 2011, we issued AD 2011-04-01, Amendment 39-16601 
(76 FR 8618, February 15, 2011). That AD required actions intended to 
address an unsafe condition on the products listed above.
    Since we issued AD 2011-04-01, Amendment 39-16601 (76 FR 8618, 
February 15, 2011), a new modification has been developed to safeguard 
the integrity of the MLG assembly and improve surface protection of the 
affected area of the MLG piston. The European Aviation Safety Agency 
(EASA), which is the Technical Agent for the Member States of the 
European Community, has issued EASA Airworthiness Directive 2011-0159, 
dated August 26, 2011 (referred to after this as ``the MCAI''), to 
correct an unsafe condition for the specified products. The MCAI 
states:

    During a normal walk around check on a F28 Mark 0100 aeroplane, 
a large crack was discovered in the lower portion of the right (RH) 
MLG piston. The affected MLG unit had accumulated 7,909 flight 
cycles (FC) at the time of detection. The piston was sent to 
Goodrich, the landing gear manufacturer, for detailed investigation, 
which revealed that the crack had been initiated by corrosion pits. 
The extent of the corrosion indicates that the initial crack existed 
for a substantial period before a high loading event caused the 
crack to grow further by ductile overload.
    This condition, if not detected and corrected, could lead to MLG 
failure during the landing roll-out, possibly resulting in damage to 
the aeroplane and injury to occupants.
    To address this potential unsafe condition, EASA issued AD 2009-
0221 [which corresponds with FAA AD 2011-04-01, Amendment 39-16601 
(76 FR 8618, February 15, 2011)] to require a one-time detailed 
visual inspection of the MLG pistons, the replacement of any MLG 
pistons on which cracks are detected, and the reporting of all 
findings to the aeroplane TC [type certificate] holder. No cracks 
were reported as a result of this inspection.
    Subsequently, a repetitive inspection was introduced in the 
Airworthiness Limitations Section (Fokker Services report SE-623 
Issue 8) in Appendix 1 of the Maintenance Review Board (MRB) 
document to safeguard the integrity of the MLG assembly, pending the 
accomplishment of a terminating action.
    Goodrich issued Service Bulletin (SB) 41000-32-29 to introduce 
an improved surface protection (nickel plate) of the affected area 
of the MLG piston P/N [part number] 41141-3 and re-identification as 
P/N 41141-5, which is considered as a terminating action for the 
repetitive inspections.
    For the reasons described above, this [EASA] AD requires 
repetitive visual inspections of the P/N 41141-3 MLG piston for 
cracks and, depending on findings, replacement or modification of 
the MLG piston. This [EASA] AD also requires modification of the 
affected MLG by installing a piston P/N 41141-5.

You may obtain further information by examining the MCAI in the AD 
docket.

Relevant Service Information

    Fokker Services B.V. has issued Fokker Service Bulletin SBF100-32-
161, dated April 7, 2011; and Fokker Engineering Report, MRB Appendix 
1, SE-623, Issue 8, dated March 17, 2011. Goodrich Aerospace Canada 
Ltd. has issued Goodrich Service Bulletin 41000-32-29, dated November 
10, 2010. The actions described in this service information are 
intended to correct the unsafe condition identified in the MCAI.

[[Page 37339]]

FAA's Determination and Requirements of This Proposed AD

    This product has been approved by the aviation authority of another 
country, and is approved for operation in the United States. Pursuant 
to our bilateral agreement with the State of Design Authority, we have 
been notified of the unsafe condition described in the MCAI and service 
information referenced above. We are proposing this AD because we 
evaluated all pertinent information and determined an unsafe condition 
exists and is likely to exist or develop on other products of the same 
type design.

Costs of Compliance

    Based on the service information, we estimate that this proposed AD 
would affect about 2 products of U.S. registry.
    The actions that are required by AD 2011-04-01, Amendment 39-16601 
(76 FR 8618, February 15, 2011), and retained in this proposed AD take 
about 3 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 $255 per product.
    We estimate that it would take about 26 work-hours per product to 
comply with the new basic requirements of this proposed AD. The average 
labor rate is $85 per work-hour. Based on these figures, we estimate 
the cost of the proposed AD on U.S. operators to be $4,420, or $2,210 
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 proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would 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 this proposed 
regulation:
    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 proposed AD and placed it in the AD docket.

List of Subjects in 14 CFR Part 39

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

The Proposed Amendment

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

PART 39--AIRWORTHINESS DIRECTIVES

    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]

    2. The FAA amends Sec.  39.13 by removing airworthiness directive 
(AD) 2011-04-01, Amendment 39-16601 (76 FR 8618, February 15, 2011), 
and adding the following new AD:

Fokker Services B.V.: Docket No. FAA-2012-0643; Directorate 
Identifier 2011-NM-190-AD.

(a) Comments Due Date

    We must receive comments by August 6, 2012.

(b) Affected ADs

    This AD supersedes AD 2011-04-01, Amendment 39-16601 (76 FR 
8618, February 15, 2011).

(c) Applicability

    (1) This AD applies to Fokker Services B.V. Model F.28 Mark 0070 
and 0100 airplanes; certificated in any category; all serial 
numbers, equipped with Goodrich (formerly Menasco, Colt Industries) 
main landing gear (MLG) units, part numbers (P/N) 41050-7, 41050-8, 
41050-9, 41050-10, 41050-11, 41050-12, 41050-13, 41050-14, 41050-15, 
41050-16, 41060-1, 41060-2, 41060-3, 41060-4, 41060-5 or 41060-6.
    (2) This AD requires revisions to certain operator maintenance 
documents to include new actions (e.g., inspections). Compliance 
with these inspections is required by 14 CFR 91.403(c). For 
airplanes that have been previously modified, altered, or repaired 
in the areas addressed by these actions, the operator may not be 
able to accomplish the actions described in the revisions. In this 
situation, to comply with 14 CFR 91.403(c), the operator must 
request approval for an alternative method of compliance according 
to paragraph (n)(1) of this AD. The request should include a 
description of changes to the required inspections that will ensure 
the continued operational safety of the airplane.

(d) Subject

    Air Transport Association (ATA) of America Code 32: Main Landing 
Gear.

(e) Reason

    This AD was prompted by a new modification developed to 
safeguard the integrity of the MLG assembly and improve surface 
protection of the affected area of the MLG piston. We are issuing 
this AD to prevent MLG failure, possibly resulting in loss of 
control of the airplane during the landing roll-out.

(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 Initial Inspection

    This paragraph restates the initial inspection required by 
paragraph (g) of AD 2011-04-01, Amendment 39-16601 (76 FR 8618, 
February 15, 2011). Within 30 days after March 22, 2011 (the 
effective date of AD 2011-04-01), do a detailed visual inspection 
for cracks of the MLG pistons, in accordance with the Accomplishment 
Instructions of Fokker Service Bulletin SBF100-32-158, dated October 
2, 2009.

(h) Retained Replacement

    This paragraph restates the replacement required by paragraph 
(h) of AD 2011-04-01, Amendment 39-16601 (76 FR 8618, February 15, 
2011). If any cracked MLG piston is found during the inspection 
required by paragraph (g) of this AD, before further flight, replace 
the affected piston with a serviceable part, in accordance with the 
Accomplishment Instructions of Fokker Service Bulletin SBF100-32-
158, dated October 2, 2009.

(i) New Requirement: Modification

    Within 120 months, or during a scheduled overhaul of the MLG, 
whichever occurs first after the effective date of this AD: Modify 
the MLG by installing a piston containing P/N 41141-5, in accordance 
with the Accomplishment Instructions of Fokker Service Bulletin 
SBF100-32-161, dated April 7, 2011. Re-installation of a MLG piston 
which has been modified and re-identified as P/N 41141-5, in 
accordance with the Accomplishment Instructions of Goodrich Service 
Bulletin 41000-32-29, dated November 10, 2010, is an optional method 
of

[[Page 37340]]

compliance for the requirements in this paragraph of this AD. It is 
acceptable to operate an airplane with one MLG having a P/N 41141-5 
piston installed, and the other MLG having a P/N 41141-3 piston 
installed, provided all MLG P/N 41141-3 are replaced within the 
compliance times specified in paragraph (i) of this AD.

(j) New Requirement: Parts Installation

    After 120 months after the effective date of this AD: No person 
may install a MLG piston, P/N 41141-3, or a MLG unit equipped with a 
MLG piston P/N 41141-3, on any airplane.

(k) New Requirement: Revising the Airplane Maintenance Program

    Within two months after the effective date of this AD: Revise 
the airplane maintenance program by incorporating Task 321100-01-16, 
inspection of the MLG piston, and associated thresholds and 
intervals described in Fokker Engineering Report, MRB Appendix 1, 
SE-623, Issue 8, dated March 17, 2011. The initial compliance time 
for Task 321100-01-16 is within two months after the effective date 
of this AD.

(l) No Alternative Actions or Intervals

    After accomplishing the revisions required by paragraph (k) of 
this AD, no alternative actions (e.g., inspections) or intervals may 
be used other than those specified in Fokker Engineering Report, MRB 
Appendix 1, SE-623, Issue 8, dated March 17, 2011, unless the 
actions and intervals are approved as an AMOC in accordance with the 
procedures specified in paragraph (m)(1) of this AD.

(m) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, 
International Branch, ANM-116, 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 International 
Branch, send it to ATTN: Tom Rodriguez, Aerospace Engineer, 
International Branch, ANM-116, Transport Airplane Directorate, FAA, 
1601 Lind Avenue SW., Renton, Washington 98057-3356; telephone 425-
227-1137; fax 425-227-1149. Information may be emailed to: 9-ANM-116-AMOC-REQUESTS@faa.gov. 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.

(n) Related Information

    (1) Refer to MCAI European Aviation Safety Agency Airworthiness 
Directive 2011-0159, dated August 26, 2011; and the service 
information specified in paragraphs (n)(1)(i) through (n)(1)(iv) of 
this AD; for related information.
    (i) Fokker Service Bulletin SBF100-32-161, dated April 7, 2011.
    (ii) Fokker Services Engineering Report, MRB Appendix 1, SE-623, 
Issue 8, dated March 17, 2011.
    (iii) Goodrich Service Bulletin 41000-32-29, dated November 10, 
2010.
    (iv) Fokker Service Bulletin SBF100-32-158, dated October 2, 
2009.
    (2) For Fokker service information identified in this AD, 
contact Fokker Services B.V., Technical Services Dept., P.O. Box 
231, 2150 AE Nieuw-Vennep, the Netherlands; telephone +31 (0)252-
627-350; fax +31 (0)252-627-211; email 
technicalservices.fokkerservices@stork.com; Internet http://www.myfokkerfleet.com. For Goodrich service information identified 
in this AD, contact Goodrich, 1400 South Service Road, West 
Oakville, L6L 5Y7, Ontario, Canada, telephone +1-905-827-7777; fax 
+1-905-825-1583; Internet http://www.goodrich.com/TechPubs. You may 
review copies of the referenced service information at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, 
Washington. For information on the availability of this material at 
the FAA, call 425-227-1221.

    Issued in Renton, Washington, on June 12, 2012.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2012-15166 Filed 6-20-12; 8:45 am]
BILLING CODE 4910-13-P


