[Federal Register Volume 72, Number 236 (Monday, December 10, 2007)]
[Rules and Regulations]
[Pages 69591-69593]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E7-23687]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-29226; Directorate Identifier 2006-NM-256-AD; 
Amendment 39-15298; AD 2007-25-16]
RIN 2120-AA64


Airworthiness Directives; McDonnell Douglas Model DC-9-81 (MD-81) 
and DC-9-82 (MD-82) Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: We are adopting a new airworthiness directive (AD) for certain 
McDonnell Douglas Model DC-9-81 (MD-81) and DC-9-82 (MD-82) airplanes. 
This AD requires, for certain airplanes, inspecting for cracking of the 
fuselage skin at the upper corners of the forward passenger doorjamb, 
installing or replacing doublers as applicable, and doing applicable 
repairs. This AD results from reports of fatigue cracking in the 
fuselage skin at the upper corners of the forward passenger doorjamb. 
We are issuing this AD to prevent cracking of the fuselage skin at the 
upper corners of the forward passenger doorjamb, which could lead to 
loss of overall structural integrity of the airplane.

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

ADDRESSES: For service information identified in this AD, contact 
Boeing Commercial Airplanes, Long Beach Division, 3855 Lakewood 
Boulevard, Long Beach, California 90846, Attention: Data and Service 
Management, Dept. C1-L5A (D800-0024).

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Management Facility 
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 address for the 
Docket Office (telephone 800-647-5527) is the Document Management 
Facility, U.S. Department of Transportation, Docket Operations, M-30, 
West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., 
Washington, DC 20590.

[[Page 69592]]


FOR FURTHER INFORMATION CONTACT: Roger Durbin, Aerospace Engineer, 
Airframe Branch, ANM-120L, FAA, Los Angeles Aircraft Certification 
Office, 3960 Paramount Boulevard, Lakewood, California 90712-4137; 
telephone (562) 627-5233; fax (562) 627-5210.

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to include an airworthiness directive (AD) that would apply to 
certain McDonnell Douglas Model DC-9-81 (MD-81) and DC-9-82 (MD-82) 
airplanes. That NPRM was published in the Federal Register on September 
19, 2007 (72 FR 53495). That NPRM proposed to require, for certain 
airplanes, inspecting for cracking of the fuselage skin at the upper 
corners of the forward passenger doorjamb, installing or replacing 
doublers as applicable, and doing applicable repairs.

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 relevant data and determined that air safety and 
the public interest require adopting the AD as proposed.

Costs of Compliance

    There are about 76 airplanes of the affected design in the 
worldwide fleet. This AD affects about 46 airplanes of U.S. registry. 
The following table provides the estimated costs for U.S. operators to 
comply with this AD, at an average labor rate of $80 per work hour. The 
actions vary depending upon the airplane configuration.

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                      Work
               Action                 hours          Parts            Cost per airplane          Fleet cost
----------------------------------------------------------------------------------------------------------------
Low frequency eddy current                1  None needed..........  $80, per inspection    Up to $3,680, per
 inspection.                                                         cycle.                 inspection cycle.
High frequency eddy current               1  None needed..........  $80, per inspection    Up to $3,680, per
 inspection.                                                         cycle.                 inspection cycle.
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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

    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 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.
    You can find our regulatory evaluation and the estimated costs of 
compliance in the AD Docket.

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:

2007-25-16 McDonnell Douglas: Amendment 39-15298. Docket No. FAA-
2007-29226; Directorate Identifier 2006-NM-256-AD.

Effective Date

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

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to McDonnell Douglas Model DC-9-81 (MD-81) 
and DC-9-82 (MD-82) airplanes; certificated in any category; as 
identified in Boeing Alert Service Bulletin MD80-53A298, dated 
August 1, 2006.

Unsafe Condition

    (d) This AD results from a report of fatigue cracking in the 
fuselage skin at the upper corners of the forward passenger 
doorjamb. We are issuing this AD to prevent cracking of the fuselage 
skin at the upper corners of the forward passenger doorjamb, which 
could lead to loss of overall structural integrity of the airplane.

Compliance

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

Repetitive Inspections and Corrective Actions for Configuration 1, 2, 
and 3 Airplanes

    (f) For airplanes identified as Configuration 1, 2, or 3 in 
Boeing Alert Service Bulletin MD80-53A298, dated August 1, 2006: At 
the applicable times specified in paragraph 1.E., ``Compliance,'' of 
the alert service bulletin, do a low-frequency eddy current (LFEC) 
or high-frequency eddy current (HFEC) inspection, as applicable, for 
cracking of the fuselage skin at the upper corners of the forward 
passenger doorjamb; and do all applicable corrective actions 
(repetitive inspections, installation of doublers, replacements, and 
repairs), except as provided by paragraph (g) of this AD. Do the 
actions in accordance with the Accomplishment Instructions of the 
alert service bulletin. Where the alert service

[[Page 69593]]

bulletin specifies a compliance time after the date on the service 
bulletin, this AD requires compliance within the specified 
compliance time after the effective date of this AD.

Repair of Certain Conditions

    (g) If any crack is found during any inspection required by 
paragraph (f) of this AD and Boeing Alert Service Bulletin MD80-
53A298, dated August 1, 2006, specifies to contact Boeing for repair 
instructions: Before further flight, repair using a method approved 
in accordance with the procedures specified in paragraph (i) of this 
AD.

Corrective Action for Configuration 4 Airplanes

    (h) For airplanes identified as Configuration 4 in Boeing Alert 
Service Bulletin MD80-53A298, dated August 1, 2006: Within 90 days 
after the effective date of this AD, repair using a method approved 
in accordance with the procedures specified in paragraph (i) of this 
AD.

Alternative Methods of Compliance (AMOCs)

    (i)(1) The Manager, Los Angeles Aircraft Certification Office 
(ACO), FAA, has the authority to approve AMOCs for this AD, if 
requested in accordance with the procedures found in 14 CFR 39.19.
    (2) To request a different method of compliance or a different 
compliance time for this AD, follow the procedures in 14 CFR 39.19. 
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.
    (3) An AMOC that provides an acceptable level of safety may be 
used for any repair required by this AD, if it is approved by an 
Authorized Representative for the Boeing Commercial Airplanes 
Delegation Option Authorization Organization who has been authorized 
by the Manager, Los Angeles ACO, to make those findings. For a 
repair method to be approved, the repair must meet the certification 
basis of the airplane and 14 CFR 25.571, Amendment 45, and the 
approval must specifically refer to this AD.

Material Incorporated by Reference

    (j) You must use the Accomplishment Instructions of Boeing Alert 
Service Bulletin MD80-53A298, dated August 1, 2006, 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 
Boeing Commercial Airplanes, Long Beach Division, 3855 Lakewood 
Boulevard, Long Beach, California 90846, Attention: Data and Service 
Management, Dept. C1-L5A (D800-0024).
    (3) You may review copies of the service information 
incorporated by reference 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/code_of_federal_regulations/ibr_locations.html.

    Issued in Renton, Washington, on November 29, 2007.
Stephen P. Boyd,
Assistant Manager, Transport Airplane Directorate, Aircraft 
Certification Service.
 [FR Doc. E7-23687 Filed 12-7-07; 8:45 am]
BILLING CODE 4910-13-P