68-23-03 AERO COMMANDER: Amendment 39-680. Applies to the Model 100 aircraft, Serial Numbers 1 through 300 and Model 100-180 aircraft, Serial Numbers 5001 through 5100. Compliance required within the next 10 hours of flight after the effective date of this airworthiness directive unless already accomplished.
To prevent further engine operation with improper octane fuel, remove existing fuel tank filler placard and install new placard in accordance with Service Bulletin S1014 dated September 30, 1968, or later FAA approved revision or in a manner approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region, unless already accomplished. Placard supplied with Service Bulletin.
This amendment becomes effective November 9, 1968.