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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
AD 47-32-07
Airworthiness Directives; Bell Model 47B Helicopters
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AGENCY: Federal Aviation Administration, DOT
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47-32-07 BELL: (Was Mandatory Note 7 of AD-1H-1.) Applies to All Model 47B With Aircooled 6V4-178-B3, -B32, O-335-1, or O-335-3 Engines.
Compliance required not later than next 25-hour inspection after September 15, 1947.
To eliminate chafing of intake manifold balance pipe against the oil tank an extra piece of hose, Aircooled P/N 11868, should be installed on the pipe at the side of the tank where the oil filter is mounted and approximately 1 3/8 inches from the hose which connects the two manifold pipes.
(Franklin Service Bulletin No. 55 dated May 28, 1947, pertains to this same subject.)
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