AD 74-25-09

74-25-09 HAMILTON STANDARD: Amendment 39-2037.

Applies to Hamilton Standard Model 54H60 propellers with the following serial numbers installed on, but not limited to, Lockheed Models L-382 and L-188 type aircraft:

Propeller Model 54H60-81 214617, 215113, 215205, 215284, 215443, 215498, 215550, 215551, 216141, 216394, 217337, 223669, 223810

Propeller Model 54H60-91 233124, 233135, 233156 thru 233175, 233210 thru 233221, 233295 thru 233298, 233335 thru 233346

Propeller Model 54H60-117 213240, 215104, 215253, 215442, 217294, 217846, 219020, 219497, 220052, 221334, 221945, 222715, 223351, 223570, 223882, 223885, 224146, 224327, 224724, 224730, 225367, 225514, 225540, 225603, 225634, 225857, 226279, 226480, 227098, 227104, 227212, 227945, 228146, 228304, 228385, 229197, 230076, 230415, 230454, 231098, 231099, 231103, 231247, 231254, 231484, 231825, 231830, 233152 thru 233155, 233186 thru 233209, 233224 thru 233231, 233246 thru 233273, 233299 thru 233334, 234146To preclude failure of undersize oil transfer tubes and possible loss of propeller control remove P/N 536496, oil transfer tube, before further flight, unless already accomplished. Replace with a P/N 536496 oil transfer tube which has been inspected using a Hamilton Standard inspection tool, P/N HSD506611T501, or by FAA approved equivalent method, and which meets or exceeds minimum wall thickness requirements of Hamilton Standard Alert Service Bulletin HS Code 54H60-A68.

The manufacturer's specifications identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(i). All persons affected by this directive who have not already received these documents may obtain copies upon request to the Hamilton Standard Division, United Aircraft Corporation, Windsor Locks, Connecticut 06096. These documents may also be examined at FAA, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803.

This amendment becomes effective upon publication in the Federal Register for all persons except those to whom it was made effective immediately by telegram.