AD 74-25-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hamilton Sundstrand | 54H | HAMILTON STANDARD Model 54H60 Propellers |
| propeller | Hamilton Sundstrand | 54H | HAMILTON STANDARD Model 54H60 Propellers |
Unsafe Condition
Failure of undersize oil transfer tubes (P/N 536496) leading to possible loss of propeller control.
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Required Actions
Remove P/N 536496 oil transfer tube before further flight unless already done. Replace with inspected P/N 536496 tube using Hamilton Standard inspection tool P/N HSD506611T501 or FAA approved equivalent, ensuring it meets minimum wall thickness per HS Code 54H60-A68.
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Compliance Time
before further flight
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Affected Aircraft
Hamilton Standard Model 54H60 propellers with specified serial numbers on Lockheed L-382 and L-188 aircraft, including serial ranges for Models 54H60-81, 54H60-91, and 54H60-117 as listed in the AD.
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Federal Register Abstract
Oil Transfer Tube
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_74-25-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-25-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: HAMILTON STANDARD Model 54H60 Propellers Subject: Oil Transfer Tube Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Hamilton Sundstrand Model: 54H Product Type: Propeller Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 74-25-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2037 AD NUMBER: 74-25-09 SUBJECT HEADING: HAMILTON STANDARD Model 54H60 Propellers ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 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, 234146 To 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. FOOTER:
Document Text
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AD Final Rules - DRS_74-25-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-25-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: HAMILTON STANDARD Model 54H60 Propellers Subject: Oil Transfer Tube Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Hamilton Sundstrand Model: 54H Product Type: Propeller Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 74-25-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2037 AD NUMBER: 74-25-09 SUBJECT HEADING: HAMILTON STANDARD Model 54H60 Propellers ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 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, 234146 To 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. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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