[Federal Register Volume 63, Number 39 (Friday, February 27, 1998)]
[Rules and Regulations]
[Pages 9930-9932]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-4247]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97-NM-280-AD; Amendment 39-10354; AD 98-04-43]
RIN 2120-AA64


Airworthiness Directives; Aerospatiale Model ATR72 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 Aerospatiale Model

[[Page 9931]]

ATR72 series airplanes, that requires removal of certain landing gear 
attachment pins, and replacement of the pins with serviceable pins. 
This amendment is prompted by issuance of mandatory continuing 
airworthiness information by a foreign civil airworthiness authority. 
The actions specified by this AD are intended to prevent wear of the 
attachment pins, which could result in collapse of the main landing 
gear.

DATES: Effective April 3, 1998.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of April 3, 1998.

ADDRESSES: The service information referenced in this AD may be 
obtained from Aerospatiale, 316 Route de Bayonne, 31060 Toulouse, Cedex 
03, 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: Norman B. Martenson, Manager, 
International Branch, ANM-116, FAA, Transport Airplane Directorate, 
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425) 
227-2110; fax (425) 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 Aerospatiale Model ATR72 
series airplanes was published in the Federal Register on December 9, 
1997 (62 FR 64777). That action proposed to require removal of certain 
landing gear attachment pins, and replacement of the pins with 
serviceable pins.

Comments

    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. No comments were submitted in response 
to the proposal or the FAA's determination of the cost to the public.

Conclusion

    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 39 airplanes of U.S. registry will be 
affected by this AD, that it will take approximately 18 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 operators. Based on these figures, the cost 
impact of the AD on U.S. operators is estimated to be $42,120, or 
$1,080 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:

98-04-43  Aerospatiale: Amendment 39-10354. Docket 97-NM-280-AD.

    Applicability: Model ATR72 series airplanes; as identified in 
Aerospatiale Service Bulletin No. ATR72-32-1036, dated June 19, 
1996, and Aerospatiale Service Bulletin No. ATR72-32-1037, dated 
June 19, 1996; certificated in any category.

    Note 1: This AD applies to each airplane identified in the 
preceding applicability provision, regardless of whether it has been 
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 (d) 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 wear of the landing gear attachment pins, which could 
result in collapse of the main landing gear (MLG), accomplish the 
following:
    (a) Within 12 months after the effective date of this AD, remove 
the MLG leg hinge pins and side brace assembly center pins having 
the part numbers (P/N) specified in paragraph B. of the Planning 
Information of Aerospatiale Service Bulletin No. ATR72-32-1036, 
dated June 19, 1996; and replace the pins with serviceable pins, in 
accordance with the Aerospatiale service bulletin and Messier-Dowty 
Service Bulletin No. 631-32-125, dated May 7, 1996.
    (b) Prior to the accumulation of 15,000 landings since the last 
overhaul of the MLG, or within 8 years since the last overhaul of 
the MLG, whichever occurs first: Remove the MLG swinging lever/
barrel pins and shock absorber/universal joint hinge pins having the 
P/N's specified in paragraph B. of the Planning Information of 
Aerospatiale Service Bulletin No. ATR72-32-1037, dated June 19, 
1996; and replace the pins with serviceable pins; in accordance with 
the Aerospatiale service bulletin and Messier-Dowty Service Bulletin 
No. 631-32-126, dated May 7, 1996.

    Note 2: Serviceable pins include those that have been removed, 
inspected, and marked with green paint in accordance with Messier-
Dowty Service Bulletin No. 631-32-125, dated May 7, 1996; or 
Messier-Dowty Service Bulletin No. 631-32-126, dated May 7, 1996; as 
applicable.

    (c) As of the effective date of this AD, no person shall install 
any MLG pin having a part number identified in Aerospatiale Service 
Bulletin No. ATR72-32-1036, dated June 19, 1996, or Aerospatiale 
Service Bulletin No. ATR72-32-1037, dated June 19, 1996, on any 
airplane unless that pin is considered to be serviceable in 
accordance with the applicable service bulletin.

[[Page 9932]]

    (d) 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, International Branch, ANM-116, 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, International 
Branch, ANM-116.

    Note 3: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the International Branch, ANM-116.

    (e) 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.
    (f) The actions shall be done in accordance with Aerospatiale 
Service Bulletin No. ATR72-32-1036, dated June 19, 1996; 
Aerospatiale Service Bulletin No. ATR72-32-1037, dated June 19, 
1996; Messier-Dowty Service Bulletin No. 631-32-125, dated May 7, 
1996; and Messier-Dowty Service Bulletin No. 631-32-126, dated May 
7, 1996. 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 Aerospatiale, 316 
Route de Bayonne, 31060 Toulouse, Cedex 03, 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.

    Note 4: The subject of this AD is addressed in French 
airworthiness directive 96-096-029(B), dated May 9, 1996.

    (g) This amendment becomes effective on April 3, 1998.

    Issued in Renton, Washington, on February 12, 1998.
Gilbert L. Thompson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 98-4247 Filed 2-26-98; 8:45 am]
BILLING CODE 4910-13-U