63-24-01 CURTISS-WRIGHT: Amdt. 647 Part 507 Federal Register November 26, 1963. Applies to All Models C634S-C400 through -C499 and C634S-C500 through -C599 Series Propellers Equipped With P/N 142080-1 Brake Assemblies. (These Propellers May Be Found Installed On Such Aircraft as Lockheed 749 and 1049.)
Compliance required within 100 hours' time in service after the effective date of this AD.
There have been failures of P/N 142080-1, threaded-type brake assemblies, causing the propellers to malfunction. To correct this unsafe condition, the following shall be accomplished:
Replace P/N 142080-1 brake assemblies with P/N's 149252-1, 152908-2, or 161462-2 brake assemblies.
(Curtiss Service Bulletins Nos. C-14 and C-32 and Parts Bulletins C-52, C-67, C-80 and C-90 cover this same subject.)
This directive effective December 27, 1963.