AD 74-25-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | 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.
AI-generated summary from the source AD text. Verify against the official source before acting.
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.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
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.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.