83-17-03 BRITISH AEROSPACE AIRCRAFT GROUP: Amendment 39-4709. Applies to all Model H.S. 748 series 2A airplanes certificated in all categories. To prevent wing structural failure accomplish the following, unless already accomplished:
A. For airplanes with wing fuel tanks extending outboard beyond rib 350.366, within the next 1,500 hours or six months time in service, whichever occurs first after the effective date of this AD, inspect the rib/stringer bracket fasteners of the wing bottom surface at rib 224.366 and at stringers 4 and 6 at all ribs on each side of wing access panels W3 to W12 except W10, and perform the actions described in paragraph 2, Accomplishment Instructions, of British Aerospace Aircraft Group H.S. 748 Service Bulletin 57/62 dated June 1980.
B. Within the next 500 hours or 60 days time in service, whichever occurs first after the effective date of this AD, inspect the rib/stringer bracket fasteners of wing bottom surface rib 16.071 and stringers 9, 10, 11, and 12 and perform the actions described in paragraph 2, Accomplishment Instructions, of British Aerospace Aircraft Group H.S. 748 Service Bulletin 57/63 dated June 1980.
C. 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.
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 September 19, 1983.