AD 93-21-11

93-21-11 FOKKER: Amendment 39-8725. Docket 93-NM-83-AD. Applicability: Model F27 series airplanes, excluding Model F27 Mark 050 series airplanes, certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent failure of the brake control valve actuating levers, accomplish the following:

(a) Within 12 months after the effective date of this AD, or prior to the accumulation of 2,000 flight hours after the effective date of this AD, whichever occurs first, replace the brake control valve actuating levers in accordance with Fokker Service Bulletin F27/32-161, Revision 1, dated June 14, 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, Standardization Branch, ANM-113, 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, Standardization Branch, ANM-113.

NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113.

(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 replacement shall be done in accordance with Fokker Service Bulletin F27/32-161, Revision 1, dated June 14, 1991, which contains the following list of effective pages:

Page Number Revision Level Shown on Page Date Shown on Page 1-2 1 June 14, 1991 3-7 Original June 5, 1989

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 Fokker Aircraft USA, Inc., 1199 North Fairfax Street, Alexandria, Virginia 22314. 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.

(e) This amendment becomes effective on December 13, 1993.