AD 90-26-02

90-26-02 BOEING: Amendment 39-6829. Docket No. 90-NM-244-AD.

Applicability: Model 747-400 series airplanes listed in Boeing Alert Service Bulletin 747-26A2170, dated July 5, 1990; and Model 767 series airplanes listed in Boeing Alert Service Bulletin 767-26A0068, Revision 1, dated September 18, 1990; certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent insufficient cargo fire protection, which could result in significant damage to the airplane in the event of a cargo compartment fire, accomplish the following:

A. For Model 747-400 series airplanes, within 30 days after October 1, 1990 (the effective date of Amendment 39-6736, AD 90-19-11), inspect the cargo compartment fire extinguisher orifices in accordance with Boeing Alert Service Bulletin 747-26A2170, dated July 5, 1990. If the part number does not match any number specified as the correct number in the service bulletin, prior to further flight withcargo in that compartment, replace with a correct part.

B. For Model 767-300 series airplanes listed in Boeing Alert Service Bulletin 767- 26A0068, dated July 5, 1990:

1. Within 30 days after October 1, 1990 (the effective date of Amendment 39-6736, AD 90-19-11), inspect the forward cargo compartment fire extinguisher orifices to determine the part number installed, in accordance with Boeing Alert Service Bulletin 767- 26A0068, dated July 5, 1990. If the part number does not match any number specified as the correct number in that service bulletin, prior to further flight with cargo in that compartment, replace with a correct part.

2. Within 30 days after the effective date of this amendment, inspect the aft cargo compartment fire extinguisher orifices to determine the part number installed, in accordance with Boeing Alert Service Bulletin 767-26A0068, Revision 1, dated September 18, 1990. If the part number does not match any number specified as the correct numberin that service bulletin, prior to further flight with cargo in that compartment, replace with a correct part.

C. For Model 767 series airplanes listed in Boeing Alert Service Bulletin 767- 26A0068, Revision 1, dated September 18, 1990, other than those that are subject to paragraph B. of this AD, within 30 days after the effective date of this amendment, inspect the cargo compartment fire extinguisher orifices to determine the part number installed, in accordance with that service bulletin. If the part number in the service bulletin does not match any number specified as the correct number in the service bulletin, prior to further flight with cargo in that compartment, replace with a correct part.

D. Within 10 days after the inspection required by paragraph A., B., or C. of this AD, if configuration discrepancies are discovered, submit a report of findings to the Manager, Seattle Manufacturing Inspection District Office, ANM-108S, FAA, Transport Airplane Directorate, 1601Lind Avenue S.W., Renton, Washington 98055-4056. The report must include the airplane serial number.

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 (ACO), FAA, Transport Airplane Directorate.

NOTE: The request should be submitted directly to the Manager, Seattle ACO, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Seattle ACO.

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 information from the manufacturer may obtain copies upon request to Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124. This information maybe examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington.

Airworthiness Directive 90-26-02 supersedes AD 90-19-11, Amendment 39-6736. This amendment (39-6829, AD 90-26-02) becomes effective on December 27, 1990.