AD 97-13-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hamilton Sundstrand | 54H | Hamilton Standard 54H60 Series Propellers |
Unsafe Condition
Propeller blade fracture due to a manufacturing defect in the beveled radius of the blade root, which could result in blade separation and loss of control of the aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove affected propeller blades from service within 50 hours time in service after the effective date and return them to the manufacturer or an approved facility for inspection, rework, and return to service. Blades with recut and cold-rolled beveled radius must be retained at the repair facility until further inspection and repair procedures are approved.
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Compliance Time
Within 50 hours time in service after the effective date of this AD
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Affected Aircraft
Hamilton Standard Models 54H60-77, -91, -111, -117, -123, and -125 propellers with serial numbers listed in Hamilton Standard Alert Service Bulletin No. 54H60-61-A133, Revision 1.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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