AD 96-05-01 Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes

Models named: DC-9-80 series. Read the applicability below — it usually turns on serial or part numbers too.

Model DC-9-80 series airplanes; as listed in McDonnell Douglas MD-80 Alert Service Bulletin A27-342, dated August 4, 1994, and in McDonnell Douglas MD-80 Alert Service Bulletin A27- 342, Revision 1, dated May 15, 1995; 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 (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.

Required as indicated, unless accomplished previously. Note 2: Paragraph (a) of this AD merely restates the requirements of paragraph (a) of AD 95-06-04, amendment 39-9174. As allowed by the phrase, ``unless accomplished previously,'' if those requirements of AD 95-06-04 have already been accomplished, this AD does not require that those actions be repeated. To prevent failure of the horizontal stabilizer primary trim motor, accomplish the following: (a) For airplanes listed in McDonnell Douglas MD-80 Alert Service Bulletin A27-342, dated August 4, 1994: Within 6 months after April 21, 1995 (the effective date of AD 95-06-04, amendment 39-9174), conduct either a visual inspection of the horizontal stabilizer primary trim motor or a records search to determine if the motor is identified with one of the suspect serial numbers listed in McDonnell Douglas MD-80 Alert Service Bulletin A27-342, dated August 4, 1994, or Revision 1, dated May 15, 1995. If a visual inspection is conducted, it must be performed in accordance with the procedures specified in the service bulletin. (1) If the horizontal stabilizer primary trim motor is not identified with a suspect serial number; or if the horizontal stabilizer primary trim motor has been modified previously in accordance with Sundstrand Service Bulletin 9590-27-012, dated August 8, 1995; no further action is required by this AD. (2) If the horizontal stabilizer primary trim motor is identified with a suspect serial number and has not been modified previously in accordance with Sundstrand Service Bulletin 9590-27- 012, dated August 8, 1995; prior to further flight, accomplish either paragraph (a)(2)(i) or (a)(2)(ii) of this AD. (i) Replace the motor in accordance with the McDonnell Douglas alert service bulletin. Or (ii) Modify the motor in accordance with Sundstrand Service Bulletin 9590-27-012, dated August 8, 1995; and install the modified motor in accordance with the McDonnell Douglas alert service bulletin. (b) For airplanes listed in McDonnell Douglas MD-80 Alert Service Bulletin A27-342, Revision 1, dated May 15, 1995, and not subject to paragraph (a) of this AD: Within 6 months after the effective date of this AD, conduct either a visual inspection of the horizontal stabilizer primary trim motor or a records search to determine if the motor is identified with one of the suspect serial numbers listed in McDonnell Douglas MD-80 Alert Service Bulletin A27-342, Revision 1, dated May 15, 1995. If a visual inspection is conducted, it must be performed in accordance with the procedures specified in that service bulletin. [[Page 8211]] (1) If the horizontal stabilizer primary trim motor is not identified with a suspect serial number; or if the horizontal stabilizer primary trim motor has been modified previously in accordance with Sundstrand Service Bulletin 9590-27-012, dated August 8, 1995; no further action is required by this AD. (2) If the horizontal stabilizer primary trim motor is identified with a suspect serial number and has not been modified previously in accordance with Sundstrand Service Bulletin 9590-27- 012, dated August 8, 1995; prior to further flight, accomplish either paragraph (b)(2)(i) or (b)(2)(ii) of this AD. (i) Replace the motor in accordance with the McDonnell Douglas alert service bulletin. Or (ii) Modify the motor in accordance with Sundstrand Service Bulletin 9590-27-012, dated August 8, 1995; and install the modified motor in accordance with the McDonnell Douglas alert service bulletin. (c) As of six months after the effective date of this AD, no person shall install, on any airplane, a horizontal stabilizer primary trim motor identified with one of the suspect serial numbers listed in McDonnell Douglas MD-80 Alert Service Bulletin A27-342, dated August 4, 1994, or Revision 1, dated May 15, 1995; unless that motor has been modified in accordance with Sundstrand Service Bulletin 9590-27-012, dated August 8, 1995. (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, Los Angeles Aircraft Certification Office (ACO), 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, Los Angeles ACO. Note 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles ACO. (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 inspection and replacement shall be done in accordance with McDonnell Douglas MD-80 Alert Service Bulletin A27-342, dated August 4, 1994; and McDonnell Douglas MD-80 Alert Service Bulletin A27-342, Revision 1, dated May 15, 1995, which contains the following list of effective pages: ------------------------------------------------------------------------ Revision level Page No. shown on page Date shown on page ------------------------------------------------------------------------ 1-5, 7-10...................... 1............... May 15, 1995. 6.............................. Original........ Aug. 4, 1994. ------------------------------------------------------------------------ The modification shall be done in accordance with Sundstrand Service Bulletin 9590-27-012, dated August 8, 1995. The incorporation by reference of McDonnell Douglas MD-80 Alert Service Bulletin A27-342, dated August 4, 1994, was approved previously by the Director of the Federal Register, in accordance with 5 U.S.C. 552(a) and 1 CFR part 51, as of April 21, 1995 (60 FR 15034, March 22, 1995). The incorporation by reference of McDonnell Douglas MD-80 Alert Service Bulletin A27-342, Revision 1, dated May 15, 1995; and Sundstrand Service Bulletin 9590-27-012, dated August 8, 1995; 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 McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Technical Publications Business Administration, Department C1-L51 (2-60); or from Sundstrand Aerospace, 4747 Harrison Avenue, P.O. Box 7002, Rockford, Illinois 61125-7002. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Los Angeles Aircraft Certification Office, Transport Airplane Directorate, 3960 Paramount Boulevard, Lakewood, California; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (g) This amendment becomes effective on April 3, 1996. Issued in Renton, Washington, on February 22, 1996. Darrell M. Pederson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 96-4508 Filed 3-1-96; 8:45 am] BILLING CODE 4910-13-U