69-08-09 LYCOMING ENGINES: Amdt. 39-751. Applies to all Lycoming Model IO-540-G1A5 engines installed with Hartzell HC-A3VK-2A/8433A-7 Propellers.
Compliance required within the next 10 hours time in service after the effective date of this AD.
To prevent failure of the engine crankshaft, install a placard on the aircraft instrument panel in clear view of the pilot and as close as practicable to the manifold pressure gage to read: "Do not exceed 24 inches Hg manifold pressure below 2400 rpm."
This amendment is effective April 23, 1969.