[Federal Register Volume 61, Number 146 (Monday, July 29, 1996)]
[Rules and Regulations]
[Pages 39306-39307]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 96-19013]
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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39
[Docket No. 95-NM-267-AD; Amendment 39-9703; AD 96-16-03]
RIN 2120-AA64
Airworthiness Directives; Airbus Model A320-200 Series Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule.
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SUMMARY: This amendment adopts a new airworthiness directive (AD),
applicable to certain Airbus Model A320-200 series airplanes, that
requires modification of the shock absorber sub-assembly of the main
landing gear (MLG). This amendment is prompted by reports of internal
damage to the shock absorber sub-assembly due to loose screws in the
upper bearing dowels. The actions specified by this AD are intended to
prevent such damage, which could result in the overextension of the
shock absorber and failure of the torque link. This situation may lead
to the inability of the MLG to retract and subsequent collapse of the
MLG.
DATES: Effective September 3, 1996.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of September 3, 1996.
ADDRESSES: The service information referenced in this AD may be
obtained from Airbus Industrie, 1 Rond Point Maurice Bellonte, 31707
Blagnac Cedex, France. This information may be examined at the Federal
Aviation Administration (FAA), Transport Airplane Directorate, Rules
Docket, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of
the Federal Register, 800 North Capitol Street, NW., suite 700,
Washington, DC.
FOR FURTHER INFORMATION CONTACT: Tim Backman, Aerospace Engineer,
Standardization Branch, ANM-113, FAA, Transport Airplane Directorate,
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (206)
227-2797; fax (206) 227-1149.
SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal
Aviation Regulations (14 CFR part 39) to include an airworthiness
directive (AD) that is applicable to certain Airbus Model A320-200
series airplanes was published in the Federal Register on April 29,
1996 (61 FR 18704). That action proposed to require modification of the
shock absorber sub-assembly of the main landing gear (MLG).
Interested persons have been afforded an opportunity to participate
in the
[[Page 39307]]
making of this amendment. Due consideration has been given to the three
comments received.
All three commenters support the proposed rule.
Conclusion
After careful review of the available data, including the comments
noted above, the FAA has determined that air safety and the public
interest require the adoption of the rule as proposed.
Cost Impact
The FAA estimates that 115 airplanes of U.S. registry will be
affected by this AD, that it will take approximately 24 work hours per
airplane to accomplish the required actions, and that the average labor
rate is $60 per work hour. Required parts will be provided by the
manufacturer at no cost to the operator. Based on these figures, the
cost impact of the AD on U.S. operators is estimated to be $165,600, or
$1,440 per airplane.
The cost impact figure discussed above is based on assumptions that
no operator has yet accomplished any of the requirements of this AD
action, and that no operator would accomplish those actions in the
future if this AD were not adopted.
Regulatory Impact
The regulations adopted herein will not have substantial direct
effects 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. Therefore, in
accordance with Executive Order 12612, it is determined that this final
rule does not have sufficient federalism implications to warrant the
preparation of a Federalism Assessment.
For the reasons discussed above, I certify that this action (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. A final evaluation has been prepared for this action
and it is contained in the Rules Docket. A copy of it may be obtained
from the Rules Docket at the location provided under the caption
ADDRESSES.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
Adoption of the Amendment
Accordingly, pursuant to the authority delegated to me by the
Administrator, the Federal Aviation Administration amends part 39 of
the Federal Aviation Regulations (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. Section 39.13 is amended by adding the following new
airworthiness directive:
96-16-03 Airbus Industries: Amendment 39-9703. Docket 95-NM-267-AD.
Applicability: Model A320-200 series airplanes on which Airbus
Modification 24594 (reference Airbus Service Bulletin A320-32-1144)
has not been installed, certificated in any category.
Note 1: This AD applies to each airplane identified in the
preceding applicability provision, regardless of whether it has been
otherwise modified, altered, or repaired in the area subject to the
requirements of this AD. For airplanes that have been modified,
altered, or repaired so that the performance of the requirements of
this AD is affected, the owner/operator must request approval for an
alternative method of compliance in accordance with paragraph (b) of
this AD. The request should include an assessment of the effect of
the modification, alteration, or repair on the unsafe condition
addressed by this AD; and, if the unsafe condition has not been
eliminated, the request should include specific proposed actions to
address it.
Compliance: Required as indicated, unless accomplished
previously.
To prevent damage to the internal area of the shock absorber
sub-assembly, which could cause an overextension of the shock
absorber and failure of the torque link, accomplish the following:
(a) Prior to the accumulation of 6,000 total landings since the
shock absorber of the main landing gear (MLG) was removed, built, or
overhauled; or within 6 months after the effective date of this AD;
whichever occurs later: Modify the shock absorber assembly of the
MLG, in accordance with Airbus Service Bulletin A320-32-1144, dated
December 8, 1994.
Note 2: Airbus Service Bulletin A320-32-1144 references Dowty
Aerospace Service Bulletin 200-32-215, dated July 7, 1994, and Dowty
Aerospace Service Bulletin 200-32-216, Revision 1, dated November
18, 1994, as additional sources of service information for
modification of the shock absorber.
(b) An alternative method of compliance or adjustment of the
compliance time that provides an acceptable level of safety may be
used if approved by the Manager, Standardization Branch, ANM-113,
FAA, Transport Airplane Directorate. Operators shall submit their
requests through an appropriate FAA Principal Maintenance Inspector,
who may add comments and then send it to the Manager,
Standardization Branch, ANM-113.
Note 3: Information concerning the existence of approved
alternative methods of compliance with this AD, if any, may be
obtained from the Standardization Branch, ANM-113.
(c) Special flight permits may be issued in accordance with
sections 21.197 and 21.199 of the Federal Aviation Regulations (14
CFR 21.197 and 21.199) to operate the airplane to a location where
the requirements of this AD can be accomplished.
(d) The modification shall be done in accordance with Airbus
Service Bulletin A320-32-1144, dated December 8, 1994. This
incorporation by reference was approved by the Director of the
Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part
51. Copies may be obtained from Airbus Industrie, 1 Rond Point
Maurice Bellonte, 31707 Blagnac Cedex, France. Copies may be
inspected at the FAA, Transport Airplane Directorate, 1601 Lind
Avenue, SW., Renton, Washington; or at the Office of the Federal
Register, 800 North Capitol Street, NW., suite 700, Washington, DC.
(e) This amendment becomes effective on September 3, 1996.
Issued in Renton, Washington, on July 22, 1996.
S.R Miller,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 96-19013 Filed 7-26-96; 8:45 am]
BILLING CODE 4910-13-U
