69-22-01 BRITISH AIRCRAFT CORPORATION: Amdt. 39-863. Applies to BAC 1-11 200 and 400 Series Airplanes.
Compliance required as indicated unless already accomplished.
To prevent a malfunction of the ventral stairway door, accomplish the following:
(a) Inspect ventral stairway starboard hinge bolt (M.M. 52-10) for signs of looseness or insecurity within the next 100 hours' time in service after the effective date of this AD unless already accomplished within the last 550 hours' time in service and thereafter at intervals not to exceed 650 hours from the last inspection.
(b) If during the inspection required by paragraph (a), the starboard hinge bolt (M.M. 52-10) is found to be insecure or to have rotated loose, secure the hinge bolt before further flight in accordance with BAC 1-11 Alert Service Bulletin 52-A-PM 3701, dated March 24, 1969, or later ARB-approved issue, or FAA-approved equivalent.
(c) The repetitive inspection required by paragraph (a) may be discontinued after the hinge bolt has been secured in accordance with paragraph (b).
This amendment becomes effective November 17, 1969.