67-14-01 AIR and SPACE: Amdt. 39-405 Part 39 Federal Register April 29, 1967. Applies to Model 18A Gyroplanes Equipped with Air and Space Rotor Blades.
Before further flight of any Air and Space Model 18A gyroplane, unless already accomplished, modify the rotor blades in accordance with Air and Space Manufacturing, Inc. Service Bulletin No. 15, dated December 27, 1966, or an equivalent approved by the Chief, Engineering and Manufacturing Branch, FAA Central Region. Upon completion of this modification the rotor blade set need not be rebalanced, but must be tracked before return to service.
NOTE: Pursuant to Air and Space Manufacturing, Inc. Maintenance and Rigging Manual, page 30, Section M, no separations are permitted in the leading edge protective strip of the rotor blade. If separation is detected, the blade should be discarded unless a repair is authorized by the Chief, Engineering and Manufacturing Branch, FAA Central Region.
This directive effective April29, 1967 and supersedes the telegraphic airworthiness directive of January 17 on the subject.