AD 2001-22-17 Airworthiness Directives; McDonnell Douglas Model DC-9-81, -9-82, -9-83, and -9-87 Series Airplanes; Model MD-88 Airplanes; and Model MD-90-30 Series Airplanes

Models named: MD-88, MD-90-30 series. Read the applicability below — it usually turns on serial or part numbers too.

Model DC-9-81, -9-82, -9-83, and “9-87 series airplanes, and Model MD-88 airplanes, as listed in McDonnell Douglas Alert Service Bulletin MD80-29A067, dated October 21, 1999; and Model MD-90-30 series airplanes, as listed in McDonnell Douglas Alert Service Bulletin MD90-29A018, dated October 21, 1999; 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 (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.

Required as indicated, unless accomplished previously. To prevent various failures of electric motors of the auxiliary hydraulic pump and associated wiring, which could result in fire at the auxiliary hydraulic pump and consequent damage to the adjacent electrical equipment and/or structure, accomplish the following: Inspection (a) Do a detailed inspection of the electric motor(s) of the auxiliary hydraulic pump for electrical resistance, continuity, mechanical rotation, and associated wiring resistance/voltage, per McDonnell Douglas Alert Service Bulletin MD80-29A067, dated October 21, 1999 (for Model DC-9-81, -9-82, -9-83, and “9-87 series airplanes, and Model MD-88 airplanes); or McDonnell Douglas Alert Service Bulletin MD90-29A018, dated October 21, 1999 (for Model MD-90-30 series airplanes); as applicable; at the applicable time specified in paragraph (a)(1), (a)(2), or (a)(3) of this AD. (1) For airplanes that have accumulated 3,000 total flight hours or more as of the effective date of this AD: Inspect within 12 months after the effective date of this AD. (2) For airplanes that have accumulated less than 3,000 total flight hours as of the effective date of this AD: Inspect within 12 months after accumulating 3,000 total flight hours. (3) For airplanes on which the inspection has been accomplished prior to the effective date of this AD: Inspect within 12 months after the effective date of this AD or within 5,600 flight hours after the previous inspection, whichever occurs later. Condition 1, No Failures: Repetitive Inspections (b) If no failures are detected during the inspection required by paragraph (a) of this AD, repeat the inspection required by paragraph (a) of this AD every 5,600 flight hours. Condition 2, Failure of Any Pump Motor: Replacement and Repetitive Inspections (c) If any pump motor fails during any inspection required by paragraph (a) of this AD, before further flight, replace the failed auxiliary hydraulic pump with a serviceable pump, per McDonnell Douglas Alert Service Bulletin MD80-29A067, dated October 21, 1999 (for Model DC-9-81, -9-82, -9-83, and “9-87 series airplanes, and Model MD-88 airplanes); or McDonnell Douglas Alert Service Bulletin MD90-29A018, dated October 21, 1999 (for Model MD-90-30 series airplanes); as applicable. Repeat the inspection required by paragraph (a) of this AD every 5,600 flight hours. Condition 3, Failure of Any Wiring: Repair and Repetitive Inspection (d) If any wiring fails during any inspection required by paragraph (a) of this AD, before further flight, troubleshoot and repair the failed wiring, per McDonnell Douglas Alert Service Bulletin MD80-29A067, dated October 21, 1999 (for Model DC-9-81, -9-82, -9-83, and “9-87 series airplanes, and Model MD-88 airplanes); or McDonnell Douglas Alert Service Bulletin MD90-29A018, dated October 21, 1999 (for Model MD-90-30 series airplanes); as applicable. Repeat the inspection required by paragraph (a) of this AD every 5,600 flight hours. Alternative Methods of Compliance (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, Los Angeles Aircraft Certification Office (ACO), FAA. 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 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles ACO. Special Flight Permit (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 airplane to a location where the requirements of this AD can be accomplished. Incorporation by Reference (g) The actions shall be done in accordance with McDonnell Douglas Alert Service Bulletin MD80-29A067, dated October 21, 1999; and McDonnell Douglas Alert Service Bulletin MD90-29A018, dated October 21, 1999. 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 Boeing Commercial Aircraft Group, Long Beach Division, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Data and Service Management, Dept. C1-L5A (D800-0024). 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, 3960 Paramount Boulevard, Lakewood, California; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. Effective Date (h) This amendment becomes effective on December 18, 2001. Issued in Renton, Washington, on November 1, 2001. Vi L. Lipski, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 01-28023 Filed 11-9-01; 8:45 am] BILLING CODE 4910-13-P