AD 81-05-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Dowty Propellers | CR 289/3-110-F/1 | DOWTY ROTOL Models (c)R.289/3-110- F/1 and (c)R.289/3-110-F/11 Propellers |
| aircraft | Dowty Propellers | CR 289/3-110-F/11 | DOWTY ROTOL Models (c)R.289/3-110- F/1 and (c)R.289/3-110-F/11 Propellers |
Unsafe Condition
Blade tip failures due to operation at manifold pressures above 26 inches Hg below 2000 RPM.
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Required Actions
Install a placard near the engine tachometer in the cockpit with 3/32 inch high lettering stating 'AVOID MP ABOVE 26 IN. HG. BELOW 2000 RPM.' Equivalent means of compliance may be approved upon operator request.
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Compliance Time
Within the next 10 hours time in service after the effective date of this AD
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Affected Aircraft
Dowty Propellers models (c)R.289/3-110-F/1 and (c)R.289/3-110-F/11 propellers installed on WSK-Pezetel Model PZL-3S engines used on Gulfstream American G-164A, B, C (modified by STC SA2731SW) and Ayres S2R-R3S, S2R (modified by STC SA3897WE) airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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