67-12-05 PILATUS: Amdt. 39-387, Part 39, Federal Register April 4, 1967. Applies to Model PC-6 Series Airplanes, Serial Numbers to 632.
Compliance required with the next 200 hours' time in service after the effective date of this AD, unless already accomplished.
To prevent rubbing and wear of the two pulley flanges as a result of a change in direction of the aileron control system cables in excess of 3 degrees from the plane of their pulleys, install fairleads at the pulley support bracket on bulkhead Number 3 in accordance with Pilatus Service Bulletin No. 68 or later Swiss Federal Air Office-approved issue, or an FAA-approved equivalent.
This directive effective May 4, 1967.