AD 80-14-11

80-14-11 BOEING: Amendment 39-3831. Applies to all Model 747 series airplanes, (equipped with nose cargo doors) certificated in all categories. To prevent inadvertent opening of the nose cargo door, accomplish the following:

A. Unless already accomplished, before further flight, in accordance with Boeing Alert Service Bulletin 747-52A2167, Revision 1, dated March 28, 1980, or later FAA approved revisions, inspect portal latch fittings 1L through 8L and 1R through 8R for loose or missing bolts. Assure the bolts are at least finger tight when checked with the nose cargo door open. If all the bolts are installed and at least finger tight, the airplane may be returned to service for a maximum of three flights. Prior to the fourth flight, verify that the bolts, washers, and nuts are per drawing specification and tightened to the correct torque, as specified in paragraph IIIE of Boeing Alert Service 747-52A2167, Revision 1, dated March 28, 1980, or later FAA approved revisions.B. If fasteners are missing or loose, before further flight replace missing fasteners and torque all fasteners as specified in Boeing Alert Service Bulletin 747-52A2167, Revision 1, dated March 28, 1980, or later FAA approved revisions.

C. If replacement bolts of the correct type are unavailable for replacement of missing fasteners, tension-rated bolts heat treated to 160 KSI minimum may be temporarily installed for a maximum of 250 flight hours. Torque these bolts in accordance with paragraph IIIB of Boeing Alert Service Bulletin 747-52A2167, Revision 1, dated March 28, 1980, or later FAA approved revisions.

D. Airplane dispatch with an inoperative latch lock system is not permitted unless the bolt/washer/nut installation and torque of all other latches is verified to be in accordance with the requirements of Boeing Alert Service Bulletin 747-52A2167, Revision 1, dated March 28, 1980, or later FAA approved revisions.

E. An unpressurized ferry flight may be made inaccordance with Sections 21.197 and 21.199 of the Federal Aviation Regulations.

F. Report to the Chief, Engineering and Manufacturing Branch, FAA Northwest Region, telephone (206) 767-2516 or 767-2600, all discrepancies found as a result of this AD. (Reporting approved by the Bureau of Budget under BOB No. 04-R0174.)

The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1).

All persons affected by this directive who have not already received these documents from the manufacturer, may obtain copies upon request to Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. These documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108.

This amendment becomes effective July 15, 1980, and was effective earlier for those recipients of telegraphic AD T-80-NW-17 dated March 27, 1980.