70-22-01 BEECH: Amendment 39-1094. Applies to Model 65-90 (Serial Numbers LJ-1 thru LJ-75) airplanes.
Compliance: Required as indicated, unless already accomplished.
To prevent overheat damage and fire hazard which may result from failure of the ventilating air blower for the fuel burning heater during ground operations, accomplish the following:
Within the next 50 hours' time in service, after the effective date of this AD, install Beech Differential Pressure Switch Kit No. 90-3053S in accordance with Beech Service Instruction No. 0372-412, or a later FAA approved revision or any equivalent modification submitted to and approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.
This amendment becomes effective October 24, 1970.