AD 93-01-27

93-01-27 BOEING: Amendment 39-8481. Docket 92-NM-91-AD.

Applicability: Model 737-100, -200, -300, and -400 series airplanes, through line number 1869; certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent the loss of primary and secondary pitch control, accomplish the following:

(a) Within 48 months after the effective date of this AD, replace plastic flight control cable guards with aluminum cable guards, in accordance with Boeing Service Bulletin 737- 27A1164, Revision 1, dated November 14, 1991.

(b) Within 48 months after the effective date of this AD, remove any previously- installed aluminum cable guards located at right buttock line (RBL) 6.60, between body stations (BS) 947.5 and 967, and relocate the aluminum cable guards to RBL 14.75, between BS 947.5 and 967; and verify that grommets are properly installed at all locations; in accordance with Boeing Service Bulletin 737-27A1164, Revision 1,dated November 14, 1991.

(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: 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 FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished.

(e) The replacement, relocation, and verification shall be done in accordance with Boeing Service Bulletin 737-27A1164, Revision 1, dated November 14, 1991. This incorporation by reference was approved by the Director ofthe 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.

(f) This amendment becomes effective on March 9, 1993.