AD 2010-05-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Dowty Propellers Models R354/4-123-F/13, R354/4-123-F/20, R375/4-123-F/21, R389/4-123-F/25, R389/4-123-F/26, and R390/4-123-F/27 Propellers |
Unsafe Condition
A number of propeller blade outer sleeves have been found with cracks since 1996. Testing has shown that blade retention integrity is not affected by this cracking. However, this condition, if not detected and corrected, can lead to blade counterweight release, possibly resulting in damage to the aircraft and injury to occupants or persons on the ground.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect all propeller blade root outer sleeves for cracks at the next 1,600 flight hours (FH) aircraft check after the effective date of this AD, or after any blade accumulates 15,000 FH time-in-service, whichever occurs later. Thereafter, repeat inspections at intervals not to exceed 1,600 FH. Remove any propeller blades found with cracked root outer sleeves before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 1,600 flight hours after the effective date or after any blade accumulates 15,000 flight hours, whichever occurs later.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Dowty Propellers Models R354/4-123-F/13, R354/4-123-F/20, R375/4-123-F/21, R389/4-123-F/25, R389/4-123-F/26, and R390/4-123-F/27 propellers installed on, but not limited to, Saab AB, Saab Aerosystems SF340A and SAAB SF340B airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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