AD 91-18-10

91-18-10 BOEING: Amendment 39-8013. Docket No. 90-NM-206-AD.

Applicability: Model 767 series airplanes equipped with brake part numbers (P/N) identified in paragraph (a) of this AD, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent the loss of main landing gear braking effectiveness, accomplish the following:

(a) Within 180 days after the effective date of this AD, incorporate the maximum brake wear limits, shown below, into the FAA-approved maintenance inspection program.

Brake Mfr. Brake P/N Boeing P/N Max. Wear Limit

Bendix 2607092-1 S160T200-12 2.15 inches Bendix 2607092-2 S160T200-13 2.15 inches Bendix 2607092-3 S160T200-14 2.15 inches Bendix 2607092-4 S160T200-15 2.15 inches Bendix 2608812-4 S160T300-12 2.56 inches Bendix 2608812-6 S160T300-14 2.90 inches

(b) An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Seattle ACO.

(c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.

This amendment (39-8013, AD 91-18-10) becomes effective on November 12, 1991.