53-16-01 BELLANCA: Applies to All Model 14-19 Series Airplanes.
Compliance required prior to September 15, 1953, and to be repeated at intervals not to exceed 100 hours flight time.
Inspect elevator trim tab system for looseness by checking free play of the trim tab. Total free play of the tab trailing edge at the maximum chord should not exceed 0.20 inch. Excessive free play may be due to excessively worn parts and/or looseness in the adjustment of the trim tab system. Excessive free play can usually be removed by accomplishing the following:
Remove retaining pin from trim tab control handle and remove handle. Pull tab control rod as far forward as possible. Add required thickness of shim or washer to take up increased length. Replace handle and pin.
Center fabric hinge should also be inspected for deterioration and replaced if necessary.
(Bellanca Service Bulletin No. 4 covers the same subject.)