AD 92-15-03

92-15-03 BOEING: Amendment 39-8296. Docket No. 91-NM-217-AD.

Applicability: Model 737 series airplanes, equipped with brake part numbers (P/N) identified in paragraphs (a) through (d) of this AD, certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

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

(a) Within 180 days after the effective date of this AD, accomplish the following:

(1) Inspect brakes having the brake part numbers shown below for wear. Any brake worn more than the maximum wear limit specified below must be replaced, prior to further flight, with a brake within that limit.

Brake Mfr. Brake P/N Boeing P/N Max. Wear Limit Bendix 2601042-1 10-61063-12 1.36 inches Bendix 2601042-2 10-61063-13 1.36 inches Bendix 2601042-3 10-61063-14 1.36 inches Bendix 2601042-4 10-61063-18 1.36 inches Bendix 2601042-5 10-61063-21 1.63 inches Bendix 2603442-2 10-61819-5 0.50 inch Bendix 2603442-3 10-61819-8 0.50 inch Bendix 2606672-1 10-61819-14 1.38 inches Bendix 2606672-2 10-61819-17 1.60 inches Bendix 2606672-3 10-61819-21 1.60 inches Bendix 2606672-4 10-61819-28 1.60 inches BFGoodrich 2-1521 10-62174-2 1.00 inch

(2) Incorporate the maximum brake wear limits specified in paragraph (a)(1) of this AD into the FAA-approved maintenance inspection program.

(b) For airplanes equipped with BFGoodrich Brake Part Number (P/N) 2-1444 (Boeing P/N 10-61819-11): Within 180 days after the effective date of this AD, accomplish the following:

(1) Accomplish the procedures described in paragraph 2.B.(1) of the Accomplishment Instructions of BFGoodrich Service Bulletin 2-1444-32-5, dated January 24, 1991. If any brake is found to be worn more than the allowable brake wear limit specified in Table 1 of that service bulletin, prior to further flight, remove and replace the brake with a brake built in accordance with paragraph 2.B.(1)b.of that service bulletin, or with a brake having more than the allowable wear remaining as specified in Table 1 of that service bulletin.

(2) Incorporate the allowable wear limits specified in Column B of Table 1 of BFGoodrich Service Bulletin 2-1444-32-5, dated January 24, 1991, into the FAA-approved maintenance inspection program.

(c) For airplanes equipped with BFGoodrich Brake P/N 2-1474; 2-1474-1, -2, -3, and -5 (Boeing P/N 10-61819-15, -22, -26, -27, and -31): Within 180 days after the effective date of this AD, accomplish the following:

(1) Accomplish one of the procedures described in paragraph 2.B.(1)a. of BFGoodrich Service Bulletin 2-1474-32-13, Revision 1, dated July 9, 1991 or Revision 2, dated February 12, 1992. If any brake is found to be worn more than the allowable brake wear limit specified in Table 1 of that service bulletin, prior to further flight, remove and replace the brake with a brake built in accordance with paragraph 2.B.(1)b. of these service bulletins, or with a brake having more than the allowable wear specified in Table 1 of these service bulletins.

(2) Incorporate the procedures described in paragraph 2.B.(1)b. of BFGoodrich Service Bulletin 2-1474-32-13, Revision 1, dated July 9, 1991 or Revision 2, dated February 12, 1992, into the FAA-approved maintenance inspection program.

(d) For brakes specified in paragraph (c) of this AD and used on Model 737-200 series airplanes only: As an alternative to the requirements of paragraph (c) of this AD, operators instead may accomplish the procedures specified in paragraphs (d)(1) and (d)(2) of this AD within 180 days after the effective date of this AD:

(1) Accomplish the procedures described in paragraph 2.B.(1)b of the Accomplishment Instructions of BFGoodrich Service Bulletin 2-1474-32-14, Revision 2, dated January 15, 1992. If any brake is found to be worn more than the allowable brake wear limit specified in Figure 1 of that service bulletin, prior to further flight, remove and replace the brake built in accordance with paragraph 2.B.(1)b. of that service bulletin, or with a brake having more than the allowable wear remaining as specified in Figure 1 of that service bulletin.

(2) Incorporate the procedures described in paragraph 2.B.(1)b. of the Accomplishment Instructions of BFGoodrich Service Bulletin 2-1474-32-14, Revision 2, dated January 15, 1992, into the FAA-approved maintenance inspection program.

(e) 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 beobtained from the Seattle ACO.

(f) 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.

(g) The inspection and replacement of landing gear brakes shall be done in accordance with the following service documents, as applicable: BFGoodrich Service Bulletin 2-1444-32-5, dated January 24, 1991; BFGoodrich Service Bulletin 2-1474-32-13, Revision 1, dated July 9, 1991; BFGoodrich Service Bulletin 2-1474-32-13, Revision 2, dated February 12, 1992; or BFGoodrich Service Bulletin 2-1474-32-14, Revision 2, dated January 15, 1992, which contains the following list of effective pages:

Page Number Revision Level Date 1, 5-8 2 January 15, 1992 2-4 1 July 9, 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 Boeing Commercial AirplaneGroup, P.O. Box 3707, Seattle, Washington 98124; and BFGoodrich Aerospace, Aircraft Wheels and Brakes Division, P.O. Box 340, Troy, Ohio 45373. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington; or at the Office of the Federal Register, 1100 L Street NW., Room 8401, Washington, DC.

(h) This amendment becomes effective on August 18, 1992.