AD 97-05-13

This amendment adopts a new airworthiness directive (AD), applicable to CFM International CFM56-5 series turbofan engines, that requires rework of the air turbine engine starter. This amendment is prompted by three reports of air turbine engine starter failures. The actions specified by this AD are intended to prevent an air turbine engine starter failure, which could result in damage to the engine electrical harnesses.

Final rule.

97-05-13 CFM International: Amendment 39-9957. Docket 95-ANE-63.
Applicability: CFM International (CFMI) CFM56-5 series turbofan engines, installed with air turbine engine starter, Part Number 301-781-201-0, installed on but not limited to Airbus A320 series aircraft.
Note 1: This airworthiness directive (AD) applies to each engine 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 engines 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 on or before July 31, 1997, unless accomplished previously.
To prevent an air turbine engine starter failure, which could result in damage to the engine electrical harnesses, accomplish the following:
(a) For air turbine engine starters, Part Number 301-781-201-0, that have not been previously reworked in accordance with any revision level of CFMI CFM56-5 Service Bulletin (SB) No. 80-003, rework the air turbine engine starter in accordance with the Accomplishment Instructions of CFMI CFM56-5 SB No. 80-003, Revision 5, dated October 25, 1994.
(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, Engine Certification Office. The request should be forwarded through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Engine Certification Office.
Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Engine Certification Office.
(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 aircraft to a location where the requirements of this AD can be accomplished.
(d) The actions required by this AD shall be done in accordance with the following CFMI SB:

Document No
Pages
Revision
Date
CFM56-5 SB No. 80-003
1-3
5
October 25, 1994

4-13
Original
July 16, 1991
Total Pages: 13.

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 CFM International, Technical Publications Department, One Neumann Way, Cincinnati, OH 45215; telephone (513) 552-2981, fax (513) 552-2816. Copies may be inspected at the FAA, New England Region, Office of the Assistant Chief Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the Federal Register, 800 North Capitol Street NW., suite 700, Washington, DC.
(e) This amendment becomes effective on June 3, 1997.

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 CFM International (CFMI) CFM56-5 series turbofan engines was published in the Federal Register on April 15, 1996 (61 FR 16420). That action proposed to require rework of the air turbine engine starter.
Interested persons have been afforded an opportunity to participate in the making of this amendment. Due consideration has been given to the comments received.
Two commenters support the rule as proposed.
Although no comments were received regarding the compliance end-date stated in the compliance section of the proposed rule, the FAA has revised the calendar end-date to July 31, 1997, based upon the anticipated effective date of this AD.
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 ofthe rule with the change described previously. The FAA has determined that this change will neither increase the economic burden on any operator nor increase the scope of the AD.
The FAA estimates that 190 engines installed on aircraft of U.S. registry will be affected by this AD, that it will take approximately 2 work hours per engine to accomplish the required actions, and that the average labor rate is $60 per work hour. Required parts will cost approximately $2,400 per engine. Based on these figures, the total cost impact of the AD on U.S. operators is estimated to be $478,800.
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 USC 106(g), 40113, 44701. 39.13 - [AMENDED]
2. Section 39.13 is amended by adding the following new airworthiness directive: