Airworthiness Directives; Eurocopter France Model AS-350B, BA, B1, B2, and D, and Model AS-355E, F, F1, F2, and N Helicopters

[Federal Register Volume 65, Number 99 (Monday, May 22, 2000)]
[Rules and Regulations]
[Pages 32016-32018]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 00-12575]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 99-SW-39-AD; Amendment 39-11734; AD 2000-10-10]
RIN 2120-AA64


Airworthiness Directives; Eurocopter France Model AS-350B, BA, 
B1, B2, and D, and Model AS-355E, F, F1, F2, and N Helicopters

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment supersedes an existing airworthiness directive 
(AD) that applies to Eurocopter France Model AS-350B, BA, B1, B2, and 
D, and Model AS-355E, F, F1, F2, and N helicopters and requires 
inspecting the main gearbox suspension bi-directional cross-beam 
(cross-beam) for cracks, and replacing the cross-beam if a crack is 
found. This amendment requires the same inspections as the existing AD, 
but adds the time intervals for performing repetitive dye-penetrant 
inspections on cross-beams with 5,000 or more hours time-in-service 
(TIS). This amendment is prompted by the discovery that time intervals 
for performing the required dye-penetrant inspections are not included 
in the existing AD. The actions specified by this AD are intended to 
prevent failure of the cross-beam that could lead to rotation of the 
main gearbox, resulting in severe vibrations and a subsequent forced 
landing.

DATES: Effective June 26, 2000.
    The incorporation by reference of certain publications listed in 
the regulations was previously approved by the Director of the Federal 
Register as of August 3, 1998 (63 FR 35128, June 29, 1998).

ADDRESSES: The service information referenced in this AD may be 
obtained from American Eurocopter Corporation, 2701 Forum Drive, Grand 
Prairie, Texas 75053-4005, telephone (972) 641-3460, fax (972) 641-
3527. This information may be examined at the FAA, Office of the 
Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort 
Worth, Texas; or at the Office

[[Page 32017]]

of the Federal Register, 800 North Capitol Street, NW., suite 700, 
Washington, DC.

FOR FURTHER INFORMATION CONTACT: Jim Grigg, Aviation Safety Engineer, 
FAA, Rotorcraft Directorate, ASW-111, 2601 Meacham Blvd., Fort Worth, 
Texas 76137, telephone (817) 222-5490, fax (817) 222-5961.

SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal 
Aviation Regulations (14 CFR part 39) by superseding AD 98-14-01, 
Amendment 39-10635 (63 FR 35128, June 29, 1998), which applies to 
Eurocopter France Model AS-350B, BA, B1, B2, and D, and Model AS-355E, 
F, F1, F2, and N helicopters, was published in the Federal Register on 
February 11, 2000 (65 FR 6927). That action proposed to require, at 
specified time intervals or cycles, repetitive visual and dye-penetrant 
inspections of the cross-beam for cracks and replacing, if necessary, 
the cross-beam with an airworthy cross-beam.
    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. No comments were received on the 
proposal or the FAA's determination of the cost to the public. The FAA 
has determined that air safety and the public interest require the 
adoption of the rule as proposed.
    The FAA estimates that 454 helicopters of U.S. registry will be 
affected by this AD. It will take approximately 0.5 work hour per 
helicopter to accomplish each visual inspection, with an estimated 
average of 150 visual inspections per helicopter; 3 work hours per 
helicopter to accomplish a dye-penetrant inspection, with an estimated 
average of 3 dye-penetrant inspections per helicopter; and 6 work hours 
per helicopter to replace the cross-beam, if necessary. The average 
labor rate is $60 per work hour. Parts will cost approximately $6,000 
per cross-beam. Based on these figures, the total cost impact of the AD 
on U.S. operators is estimated to be $5,175,600 to perform 150 visual 
inspections and an average of 3 dye-penetrant inspections per 
helicopter and to replace the cross-beam on all 454 helicopters.
    The regulations adopted herein 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. Therefore, it 
is determined that this final rule does not have federalism 
implications under Executive Order 13132.
    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 removing Amendment 39-10635 (63 FR 
35128), and by adding a new airworthiness directive (AD), Amendment 39-
11734, to read as follows:

AD 2000-10-10  Eurocopter France: Amendment 39-11734. Docket No. 99-
SW-39-AD. Supersedes AD 98-14-01, Amendment 39-10635, Docket No. 97-
SW-25-AD.

    Applicability: Model AS-350B, BA, B1, B2, and D, and Model AS-
355E, F, F1, F2, and N helicopters, with main gearbox suspension bi-
directional cross-beam (cross-beam), part number (P/N) 350A38-1018--
all dash numbers, installed, certificated in any category.

    Note 1: This AD applies to each helicopter 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 helicopters 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 (e) 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 failure of the cross-beam that could lead to rotation 
of the main gearbox, resulting in severe vibrations and a subsequent 
forced landing, accomplish the following:
    (a) For cross-beams having 2,000 or more hours time-in-service 
(TIS) or 10,000 or more operating cycles, whichever occurs first:

    Note 2: The Master Service Recommendations and the flight log 
contain accepted procedures that are used to determine the 
cumulative operating cycles on the rotorcraft.

    (1) Within 30 hours TIS, and thereafter at intervals not to 
exceed 30 hours TIS or 150 operating cycles, whichever occurs first, 
visually inspect the cross-beam for cracks in accordance with 
paragraph 2.B.1) of Eurocopter France Service Bulletin No. 05.00.28, 
applicable to Model AS-350 helicopters, or Eurocopter France Service 
Bulletin No. 05.00.29, applicable to Model AS-355 helicopters, both 
dated May 26, 1997.
    (2) If a crack is found, remove the cross-beam and replace it 
with an airworthy cross-beam.
    (b) For cross-beams having 5,000 or more hours TIS:
    (1) In addition to continuing the repetitive inspections of 
paragraph (a)(1), before further flight, and thereafter at intervals 
not to exceed 550 hours TIS or 2,750 operating cycles, whichever 
occurs first, perform a dye-penetrant inspection in accordance with 
paragraph 2.B.2) of Eurocopter France Service Bulletin No. 05.00.28, 
applicable to Model AS-350 helicopters, or Eurocopter Service 
Bulletin No. 05.00.29, applicable to Model AS-355 helicopters, both 
dated May 26, 1996.
    (2) If a crack is found, remove the cross-beam and replace it 
with an airworthy cross-beam.
    (c) Prior to installing any replacement cross-beams, regardless 
of TIS or operating cycles, inspect the replacement cross-beam in 
accordance with paragraph (b)(1) of this AD.
    (d) Modifying the helicopter in accordance with paragraph 2.B of 
the Accomplishment Instructions in Eurocopter Service Bulletin No. 
63.00.07, applicable to Model AS-350B, BA, B1, B2, and D 
helicopters, or Eurocopter Service Bulletin No. 63.00.13, applicable 
to Model AS-355E, F, F1, F2, and N helicopters, both dated April 7, 
1997, constitutes terminating action for the requirements of this 
AD.

[[Page 32018]]

    (e) 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, Regulations Group, Rotorcraft 
Directorate, FAA. Operators shall submit their requests through an 
FAA Principal Maintenance Inspector, who may concur or comment and 
then send it to the Manager, Regulations Group.

    Note 3: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Regulations Group.

    (f) 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 helicopter to a location where 
the requirements of this AD can be accomplished.
    (g) The inspections and replacements, if necessary, shall be 
done in accordance with Eurocopter France Service Bulletin No. 
05.00.28, applicable to Model AS-350 helicopters, and Eurocopter 
France Service Bulletin No. 05.00.29, applicable to Model AS-355 
helicopters, both dated May 26, 1997. The incorporation by reference 
of those documents was previously approved by the Director of the 
Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 
51 as of August 3, 1998 (63 FR 35128, June 29, 1998). Copies may be 
obtained from American Eurocopter Corporation, 2701 Forum Drive, 
Grand Prairie, Texas 75053-4005, telephone (972) 641-3460, fax (972) 
641-3527. Copies may be inspected at the FAA, Office of the Regional 
Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, 
Texas; or at the Office of the Federal Register, 800 North Capitol 
Street, NW., suite 700, Washington, DC.
    (h) This amendment becomes effective on June 26, 2000.


    Note 4: The subject of this AD is addressed in Direction 
Generale De L'Aviation Civile (France) AD 96-156-071(B)R1 and AD 96-
155-053(B)R1, both dated June 4, 1997.


    Issued in Fort Worth, Texas, on May 11, 2000.
Eric Bries,
Acting Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. 00-12575 Filed 5-19-00; 8:45 am]
BILLING CODE 4910-13-U

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