AD 92-19-12

92-19-12 LEARJET (FORMERLY GATES LEARJET): Amendment 39-8370. Docket No. 92-NM-111-AD.

Applicability: Model 23, 24, 25, 28, 29, 31, 35, and 36 series airplanes, as listed in Learjet Airplane Modification Kit No. AMK 90-5, dated October 11, 1991; certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent electrical arcing and an in-flight fire, accomplish the following:

(a) Within 30 days after the effective date of this AD, modify the crew oxygen plumbing and map light wires, in accordance with Learjet Airplane Modification Kit AMK No. 90-5, dated October 11, 1991.

(b) 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, Wichita Aircraft Certification Office (ACO), ACE-115W, FAA, Small 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, Wichita ACO.

NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Wichita ACO.

(c) 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.

(d) The modification shall be done in accordance with Learjet Airplane Modification Kit AMK No. 90-5, dated October 11, 1991. 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 Learjet Corporation, Customer Services, P.O. Box 7707, Wichita, Kansas 67277-7707. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at FAA, Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.

(e) This amendment becomes effective on November 17, 1992.