Airworthiness Directive · Amendment 39-9305 · Vickers-Armstrongs (Aircraft Limited) Airplanes
Vickers-Armstrongs (Aircraft Limited) Airplanes
This AD applies to Vickers-Armstrongs (Aircraft Limited) Viscount 744, Viscount 745D, Viscount 810.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment adopts a new airworthiness directive (AD), applicable to all British Aerospace Model Viscount 744, 745D, and 810 airplanes, that requires an inspection of fittings of the engine mount structure to determine whether fasteners have been installed in inspection holes and to determine whether those holes are oversized. It also requires various follow-on actions, depending upon the results of the inspection. This amendment is prompted by reports indicating that fasteners were installed in the inspection hole of the engine "W" frame socket fittings and the inspection hole was oversized due to fatigue cracking. The actions specified by this AD are intended to prevent such fatigue cracking, which could lead to failure of the fasteners and consequent separation of the engine from the airframe.
