AD 93-19-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Dowty Propellers | (c) R.354 | Dowty Rotol (now Dowty Aerospace Gloucester Ltd.) Models (c)R354/4-123-F/13, (c)R354/4-123-F/20, and (c)R375/4-123-F/21 Propellers |
| aircraft | Dowty Propellers | (c) R.375 | Dowty Rotol (now Dowty Aerospace Gloucester Ltd.) Models (c)R354/4-123-F/13, (c)R354/4-123-F/20, and (c)R375/4-123-F/21 Propellers |
Unsafe Condition
Possible loss of the propeller due to low torque or cracks in propeller retention bolts or hubs.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install interface shim part number 660712669 per SB SF340-61-57; perform torque checks and magnetic particle inspections of retention bolts, dye penetrant, ultrasonic, and eddy current inspections of hub backface for cracks. Replace cracked components before further flight. Compliance intervals vary based on model and prior inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 500 hours time in service since last torque check and inspections under AD 87-21-51 (for model R354/4-123-F/13) or within 100 hours TIS after AD effective date or 500 hours TIS since last inspections (for models R354/4-123-F/20 and R375/4-123-F/21). Thereafter, inspections every 1500 hours TIS.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Dowty Aerospace Gloucester Ltd. Models (c)R354/4-123-F/13, (c)R354/4-123-F/20, and (c)R375/4-123-F/21 propellers installed on SAAB-SF340A and SF340B series aircraft.
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
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