AD 85-03-05

85-03-05 BRITISH AEROSPACE: Amendment 39-5001. Applies to Model HS 748 airplanes, certificated in all categories, which are listed in the British Aerospace service bulletins specified below. Compliance is required within the time interval specified in each of the following paragraphs, unless previously accomplished:

A. To ensure the baggage door properly locks from the interior, within 180 days after the effective date of this airworthiness directive (AD), modify the baggage door in accordance with British Aerospace HS 748 Service Bulletin 52/94, dated May 14, 1982.

B. To ensure the passenger and crew/freight doors properly lock, within 180 days after the effective date of this AD, modify the doors in accordance with British Aerospace HS 748 Service Bulletin 52/95, dated May 14, 1982.

C. To prevent false door warnings on baggage, passenger, and crew/freight doors, within 180 days after the effective date of this AD, modify the doors in accordance with British Aerospace HS 748 Service Bulletin 52/96, dated May 14, 1982.

D. To ensure passenger, baggage, and crew/freight doors properly lock, within 90 days after the effective date of this AD, install warning decals to the interior trim of the doors in accordance with British Aerospace HS 748 Service Bulletin 52/97, dated May 14, 1982.

E. To prevent false door warnings on baggage and crew/freight doors, within 180 days after the effective date of this AD, modify the doors in accordance with British Aerospace HS 748 Service Bulletin 52/99, dated May 14, 1982.

F. To ensure the large freight door properly locks, within 90 days after the effective date of this AD, install warning decals to the interior trim of the door in accordance with British Aerospace HS 748 Service Bulletin 52/100, dated May 14, 1982.

G. To prevent failure of the crew/freight door locking mechanism swivel lever, within 90 days after the effective date of this AD, inspect the swivel levers in accordance withBritish Aerospace HS 748 Service Bulletin 52/101, Revision 1, dated December 1983. If necessary, replace parts in accordance with the service bulletin instructions. Repetitive inspections must be performed in accordance with the service bulletin instructions.

H. To ensure the integrity of door sills and secondary locking mechanisms, inspect the passenger, baggage, and crew/freight doors (including the large freight door), within 180 days after the effective date of this AD, in accordance with British Aerospace HS 748 Service Bulletin 52/106, dated November 1982. If necessary, replace parts in accordance with the service bulletin instructions. Repetitive inspections must be performed in accordance with the service bulletin instructions.

I. To provide an audible door unsafe warning on all airplanes, except Model 235, within 180 days after the effective date of this AD, install an audible warning system in accordance with British Aerospace HS 748 service bulletin 52/109,dated October 13, 1982.

J. To provide an audible door unsafe warning on Model 235 airplanes, within 180 days after the effective date of this AD, install an audible warning system in accordance with British Aerospace HS 748 Service Bulletin 52/110, dated October 13, 1982.

K. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

L. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications required by this AD.

This amendment becomes effective March 11, 1985.