65-28-06 VICKERS: Amdt. 39-165 Part 39 Federal Register December 14, 1965. Applies to Viscount Model 810 Series Airplanes.
Compliance required within the next 500 hours' time in service after the effective date of this AD unless already accomplished.
To prevent overloading of the emergency inverter type 32E01-2-A in the event of main d.c. bus-bar failure, replace the carbon pile voltage regulators AB5859 or 877928 with Bendix Corporation solid state voltage regulator 4B39-15.
(British Aircraft Corporation (Operating) Ltd., (Weybridge Division) Modification Bulletin No. G.2015 (810 Series) and later ARB-approved issues cover this subject.)
This directive effective January 13, 1966.