58-24-04 VICKERS: Applies to All Viscount Models 745D and 810 Series Aircraft.
Compliance required by May 15, 1959.
1. In order to provide a means of checking the electrical continuity of the stall warning system, install a switch in the cockpit and associated wiring for the nose gear oleo switch and Safe Flight wing detector vane. Revisions to the airplane flight manuals for Models 745D and 810 include instructions to the pilot for making the necessary checks. (Vickers Modification Bulletin No. D.2858 for 745D and FG.1487 for 810 cover the same subject.)
2. Periodic checking to assure proper calibration of the detector vane and correct functioning of the deicing heater are also required.
(Technical News Sheet No. 212 for 745D and 69 for 810 cover the same subject.)