AD 88-19-03 R1

88-19-03 R1 BOEING: Amendment 39-6001 as revised by Amendment 39-6532. Docket No. 89-NM-156-AD.

Applicability: Model 767 series airplanes, line numbers 001 through 175, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent a condition that could lead to depressurization of the airplane, accomplish the following:

A. Prior to the accumulation of 6,000 flight cycles or within the next 1,000 flight cycles after September 26, 1988, (effective date of Amendment 39-6001), whichever occurs later, unless accomplished within the last 5,000 flight cycles, and thereafter at intervals not to exceed 6,000 flight cycles, perform a detailed visual inspection of the aft side of the entire body station 1582 pressure bulkhead for damage (as defined in the Structural Repair Manual) and cracking, in accordance with Boeing Service Bulletin 767-53-0026, dated November 19, 1987, or Revision 1, dated March 16, 1989.

B. Priorto the accumulation of 25,000 flight cycles, and thereafter at intervals not to exceed 6,000 flight cycles, perform an eddy current inspection of the body station 1582 pressure bulkhead, in accordance with paragraph C. of the Accomplishment Instructions of Boeing Service Bulletin 767-53-0026, Revision 1, dated March 16, 1989.

C. Repair all damage and cracking prior to further flight in accordance with NOTE 4 in the Accomplishment Instructions of Boeing Service Bulletin 767-53-0026, Revision 1, dated March 16, 1989.

D. For the purpose of complying with this AD, the number of flight cycles may be determined to equal the number of pressurization cycles where the cabin pressure differential was equal to or greater than 2.0 PSI.

E. An alternate means 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, FAA, Northwest Mountain Region.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment, and then send it to the Manager, Seattle Aircraft Certification Office.

F. 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.

All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124. These documents may be examined at FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or at the Seattle Aircraft Certification Office, FAA, Northwest Mountain Region, 9010 East Marginal Way South, Seattle, Washington.

This AD revises AD 88-19-03, Amendment 39-6001. This amendment (39-6532, AD 88-19-03 R1) becomes effective on April 13, 1990.