AD 93-13-01

93-13-01 BOEING: Amendment 39-8614. Docket 92-NM-239-AD.

Applicability: Model 757 series airplanes, line numbers 1 through 411 inclusive, 413 through 444 inclusive, 446 through 470 inclusive, and 472 through 480 inclusive; and Model 767 series airplanes, line numbers 1 through 451 inclusive; certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent the inability to restart the engines in the event of a dual engine flameout, accomplish the following:

(a) Within 12 months after the effective date of this AD, perform an examination of the nameplate on the static inverter to determine the part number of the static inverter, in accordance with Boeing Service Bulletin 757-24A0069, Revision 1, dated December 10, 1992 (for Model 757 series airplanes); or Boeing Alert Service Bulletin 767-24A0085, dated September 17, 1992 (for Model 767 series airplanes); as applicable.

(1) If Boeing part number (P/N) S282T004-7appears on the nameplate of the static inverter, prior to further flight, replace the static inverter with an improved model and perform an operational test, in accordance with the applicable service bulletin.

(2) If Boeing P/N S282T004-7 does not appear on the nameplate of the static inverter, no further action is required by this AD.

(b) As of the effective date of this AD, no person shall install a static inverter having P/N S282T004-7 on any Model 757 or 767 series airplane.

(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 examination, replacement, and operational test shall be done in accordance with Boeing Service Bulletin 757-24A0069, Revision 1, dated December 10, 1992 (for Model 757 series airplanes); or Boeing Alert Service Bulletin 767-24A0085, dated September 17, 1992 (for Model 767 series airplanes); as applicable. 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.

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