73-13-06 HAWKER SIDDELEY: Amdt. 39-1671. Applies to Hawker Siddeley deHavilland Model DH-114 "Heron" Airplanes, having Modifications 496 installed.
Compliance is required as indicated.
To prevent possible inadvertent actuation of aileron and rudder trim in a direction other than that desired and to prevent possible interference by the aileron trim jack with the aileron when in its full down position, accomplish the following:
Prior to September 21, 1973, unless already accomplished, incorporate Hawker Siddeley Modifications Nos. 1006 and 1053, or FAA-approved equivalents.
This amendment becomes effective June 23, 1973.