Airworthiness Directives; British Aerospace Model Viscount 744, 745D, and 810 Series Airplanes

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This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all British Aerospace Model Viscount 744, 745D, and 810 series airplanes. This proposal would require various inspections to detect damage, corrosion, or cracking of certain taper plugs and split bushings of the engine mount, and replacement of taper plugs or split bushings with serviceable parts, if necessary. This proposal is prompted by a report of damage of the taper plug and split bushing of the engine mount due to the effects of corrosion. The actions specified by the proposed AD are intended to prevent such damage, which could lead to failure of the engine mount attachment assembly and consequent separation of the engine from the airplane.