47-32-15 SIKORSKY: (Was Mandatory Note 1 of AD-2H-1.) Applies to Model S-51 Helicopters.
Compliance required prior to next flight.
Inspect the chain and sprockets of the control system for an accumulation of excessive grease and foreign matter. Excessive grease and any foreign matter adhering to the chain and sprockets should be removed prior to the next flight in order to prevent possible malfunctioning of the flight control system. The recommended procedure as contained in the Sikorsky Service Information Circular No. 17 dated June 2, 1947, should be followed at the first disassembly of these parts.