

[Federal Register: December 10, 2007 (Volume 72, Number 236)]
[Rules and Regulations]               
[Page 69606-69607]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr10de07-17]                         

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-29256; Directorate Identifier 2007-NM-137-AD; 
Amendment 39-15293; AD 2007-25-11]
RIN 2120-AA64

 
Airworthiness Directives; Fokker Model F.28 Mark 0070 and 0100 
Airplanes

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

ACTION: Final rule.

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SUMMARY: We are adopting a new airworthiness directive (AD) for the 
products listed above. This AD results from mandatory continuing 
airworthiness information (MCAI) originated by an aviation authority of 
another country to identify and correct an unsafe condition on an 
aviation product. The MCAI describes the unsafe condition as:

    Two events have been reported of Fokker 100 (F.28 Mk.0100) 
aircraft, where the Nose Landing Gear (NLG) failed to extend in the 
normal mode and problems were experienced to open the NLG doors, 
almost preventing extension of the NLG in the emergency (alternate) 
mode. Subsequent investigation and tests have shown that the 
friction of the bearing in the roller of the NLG Door Uplock Bracket 
Assembly is high, causing increased resistance in the mechanical 
system that unlocks the NLG doors. This condition, if not corrected, 
may result in a NLG up landing, which is considered a hazardous 
event. * * *

We are issuing this AD to require actions to correct the unsafe 
condition on these products.

DATES: This AD becomes effective January 14, 2008.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of January 14, 
2008.

ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov
 or in person at the 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: Tom Rodriguez, Aerospace Engineer, 
International Branch, ANM-116, FAA, Transport Airplane Directorate, 
1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 
227-1137; fax (425) 227-1149.

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to include an AD that would apply to the specified products. 
That NPRM was published in the Federal Register on September 20, 2007 
(72 FR 53709). That NPRM proposed to correct an unsafe condition for 
the specified products. The MCAI states:

    Two events have been reported of Fokker 100 (F.28 Mk.0100) 
aircraft, where the Nose Landing Gear (NLG) failed to extend in the 
normal mode and problems were experienced to open the NLG doors, 
almost preventing extension of the NLG in the emergency (alternate) 
mode. Subsequent investigation and tests have shown that the 
friction of the bearing in the roller of the NLG Door Uplock Bracket 
Assembly is high, causing increased resistance in the mechanical 
system that unlocks the NLG doors. This condition, if not corrected, 
may result in a NLG up landing, which is considered a hazardous 
event. Since a potentially unsafe condition has been identified that 
may exist or develop on aircraft of the same type design, this 
Airworthiness Directive requires the introduction of an improved 
roller in the NLG Door Uplock Bracket Assembly.

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 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 the AD as proposed.

Differences Between This AD and the MCAI or Service Information

    We have reviewed the MCAI and related service information and, in 
general, agree with their substance. But we might have found it 
necessary to use different words from those in the MCAI to ensure the 
AD is clear for U.S. operators and is enforceable. In making these 
changes, we do not intend to differ substantively from the information 
provided in the MCAI and related service information.
    We might also have required different actions in this AD from those 
in the MCAI in order to follow our FAA policies. Any such differences 
are highlighted in a NOTE within the AD.

Costs of Compliance

    We estimate that this AD will affect about 13 products of U.S. 
registry. We also estimate that it will take about 5 work-hours per 
product to comply with the basic requirements of this AD. The average 
labor rate is $80 per work-hour. Required parts will cost about $135 
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 $6,955, or $535 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.

[[Page 69607]]

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 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); 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.
    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 the NPRM, 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.

List of Subjects in 14 CFR Part 39

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

Adoption of the Amendment

0
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 AD:

2007-25-11 Fokker Services B.V.: Amendment 39-15293. Docket No. FAA-
2007-29256; Directorate Identifier 2007-NM-137-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective January 
14, 2008.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Fokker Model F.28 Mark 0070 and 0100 
airplanes, certificated in any category, all serial numbers.

Subject

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

Reason

    (e) The mandatory continuing airworthiness information (MCAI) 
states:
    Two events have been reported of Fokker 100 (F.28 Mk.0100) 
aircraft, where the Nose Landing Gear (NLG) failed to extend in the 
normal mode and problems were experienced to open the NLG doors, 
almost preventing extension of the NLG in the emergency (alternate) 
mode. Subsequent investigation and tests have shown that the 
friction of the bearing in the roller of the NLG Door Uplock Bracket 
Assembly is high, causing increased resistance in the mechanical 
system that unlocks the NLG doors. This condition, if not corrected, 
may result in a NLG up landing, which is considered a hazardous 
event. Since a potentially unsafe condition has been identified that 
may exist or develop on aircraft of the same type design, this 
Airworthiness Directive requires the introduction of an improved 
roller in the NLG Door Uplock Bracket Assembly.

Actions and Compliance

    (f) Unless already done, do the following actions.
    (1) Within 4,000 flight hours after the effective date of this 
AD, modify the NLG door uplock bracket assembly, in accordance with 
the Accomplishment Instructions of Fokker Service Bulletin SBF100-
32-143, dated February 15, 2006.
    (2) As of 18 months after the effective date of this AD, no 
spare NLG door uplock bracket assembly may be installed as a 
replacement part unless it has been modified in accordance with the 
Accomplishment Instructions of Fokker Component Service Bulletin 
D76501-32-17, dated February 15, 2006.

FAA AD Differences

    Note: This AD differs from the MCAI and/or service information 
as follows: No difference.

Other FAA AD Provisions

    (g) The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, 
International Branch, ANM-116, Transport Airplane Directorate, FAA, 
has the authority to approve AMOCs for this AD, if requested using 
the procedures found in 14 CFR 39.19. Send information 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. 
Before using any approved AMOC on any airplane to which the AMOC 
applies, notify your appropriate principal inspector (PI) in the FAA 
Flight Standards District Office (FSDO), or lacking a PI, your local 
FSDO.
    (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.
    (3) Reporting Requirements: For any reporting requirement in 
this AD, under the provisions of the Paperwork Reduction Act, the 
Office of Management and Budget (OMB) has approved the information 
collection requirements and has assigned OMB Control Number 2120-
0056.

Related Information

    (h) Refer to MCAI Dutch Airworthiness Directive NL-2006-004, 
dated February 28, 2006; Fokker Service Bulletin SBF100-32-143, 
dated February 15, 2006; and Fokker Component Service Bulletin 
D76501-32-17, dated February 15, 2006, for related information.

Material Incorporated by Reference

    (i) You must use Fokker Service Bulletin SBF100-32-143, dated 
February 15, 2006; and Fokker Component Service Bulletin D76501-32-
17, dated February 15, 2006; as applicable, to do the actions 
required by this AD, unless the AD specifies otherwise.
    (1) The Director of the Federal Register approved the 
incorporation by reference of this service information under 5 
U.S.C. 552(a) and 1 CFR part 51.
    (2) For service information identified in this AD, contact 
Fokker Services B.V., Technical Services Dept., P.O. Box 231, 2150 
AE Nieuw-Vennep, the Netherlands.
    (3) You may review copies at the FAA, Transport Airplane 
Directorate, 1601 Lind Avenue, SW., Renton, Washington; or 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 November 23, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E7-23636 Filed 12-7-07; 8:45 am]

BILLING CODE 4910-13-P
