AD 73-12-04

73-12-04 BRITISH AIRCRAFT CORPORATION: Amdt. 39-1654. Applies to Viscount Model 810 Series Airplanes, which do not incorporate Modification G.1843.

Compliance is required as indicated.

To detect loose or sheared rivets on the airsteps hinged fairing operating link, accomplish the following:

(a) Within the next 25 hours' time in service after the effective date of this AD, unless already accomplished within the last 475 hours' time in service prior to the effective date of this AD, and thereafter at intervals not to exceed 500 hours' time in service from the last inspection, inspect the 3/16 inch diameter rivets on the airsteps hinged fairing operating link for looseness and shearing.

(b) If sheared or loose rivets are found during an inspection required by paragraph (a), before further flight, either -

(1) Replace the sheared or loose rivets with serviceable rivets of the same type, that are approved for installation in the assembly, and continue to inspect inaccordance with paragraph (a); or

(2) Incorporate Modification G.1843, dated September 22, 1961, or an FAA- approved equivalent.

(c) The repetitive inspections required by this AD may be discontinued after Modification G.1843 is incorporated.

This amendment becomes effective July 1, 1973.