74-15-07 BELLANCA AIRCRAFT CORPORATION: Amendment 39-1901. Applies to Bellanca Models 8GCBC aircraft Serial Numbers 2-74 to an including 62-74.
Before further flight, verify that the propeller is properly indexed to the crankshaft flange. This can be accomplished by removing the upper cowling and examining the aft face of the crankshaft flange to determine if the shoulders of all six bushings are seated upon the rear face of flange. If incorrectly indexed, two bushing shoulders will be approximately 1/16 inch off flange surface. If incorrect, propeller and spacer must be removed and all parts inspected for damage and replaced as necessary. If undamaged, replace spacer and propeller, assuring proper indexing to crank flange and torque six bolts to 660-780 inch pounds.
This amendment is effective July 26, 1974, and was effective July 2, 1974, for all recipients of the telegram dated July 2, 1974, which contained this amendment.