AD 98-24-34
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hamilton Sundstrand | 54H | Airworthiness Directives; Hamilton Standard 54H60 Series Propellers |
Unsafe Condition
Propeller blade cracks due to incomplete cold rolling during manufacture in the beveled radius area of the blade flange, which can result in blade separation and damage to the aircraft.
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Required Actions
Remove affected propeller blades identified by serial number from service and ship to designated repair facilities for inspection and necessary repair. Blades in ASB 54H60-61-A135 must be inspected within 100 hours time in service or by September 30, 2002. Blades in ASB 54H60-61-A134 must be inspected within 4,500 hours time since overhaul (or 4,500 hours time since new if never overhauled), with removal required by September 30, 2002.
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Compliance Time
Within 100 hours time in service after the effective date or prior to September 30, 2002, whichever comes first (for ASB 54H60-61-A135); within 4,500 hours time since overhaul (or 4,500 hours time since new if never overhauled) or prior to September 30, 2002 (for ASB 54H60-61-A134).
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Affected Aircraft
Hamilton Standard Models 54H60-77, -91, -117, -123, and -125 propellers with blades identified by serial number in ASB 54H60-61-A134 (Rev.1) and ASB 54H60-61-A135.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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