AD 97-01-10 Airworthiness Directives; Boeing Model 737-100 and -200 Series Airplanes

Models named: 737-100, -200 series. Read the applicability below — it usually turns on serial or part numbers too.

Model 737-100 and -200 series airplanes; as listed in Boeing 737 Service Bulletin 27-1033, dated February 13, 1970; 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 (c) 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 an unexpected, significant control upset due to mechanical interference [[Page 2009]] within the lateral control system transfer mechanism, which could result in reduced travel of a control wheel and above normal control wheel forces during a jam override, accomplish the following: (a) Within 18 months after the effective date of this AD: Accomplish the requirements of either paragraph (a)(1) or (a)(2) of this AD, in accordance with Boeing 737 Service Bulletin 27-1033, dated February 13, 1970. (1) Replace the aileron control transfer mechanism, part number (P/N) 65-54200-4 or -5, with a new modified mechanism in accordance with Procedure II of the Accomplishment Instructions of the service bulletin. (b) As of the effective date of this AD, no person shall install an aileron control transfer mechanism having P/N 65-54200-4 or -5 unless it has been reworked in accordance with the requirements of paragraph (a)(2) of this AD. (c) 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, Seattle 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, Seattle ACO. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Seattle ACO. (d) 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. (e) The replacement and rework shall be done in accordance with Boeing 737 Service Bulletin 27-1033, dated February 13, 1970. 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 Airplane Group, P.O. Box 3707, Seattle, Washington 98124-2207. 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. 1(f) This amendment becomes effective on February 19, 1997. Issued in Renton, Washington, on January 3, 1997. S.R. Miller, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 97-537 Filed 1-14-97; 8:45 am] BILLING CODE 4910-13-U