AD 2000-12-18
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce | Ltd | Airworthiness Directives; Rolls-Royce Ltd. Dart 511, 511-7E, 514-7, 528, 528-7E, 529-7E, 532-7, 532-7L, 532-7N, 532-7P, 532-7R, 535-7R, 551-7R, and 552-7R Turboprop Engines |
Unsafe Condition
Failure of the reduction gear housing (RGH) annulus gear, which results in propeller overspeeding and the release of a propeller blade, causing damage to the airplane or adjacent engine.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a feathering probe in the front bearing panel of the reduction gearbox. Install a steel retaining ring between the nose casing and the front bearing panel. Replace the existing transfer bobbin with an aluminum bobbin.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At the next shop visit after the effective date of the AD, or by December 31, 2000, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Rolls-Royce Ltd. Dart 511, 511-7E, 514-7, 528, 528-7E, 529-7E, 532-7, 532-7L, 532-7N, 532-7P, 532-7R, 535-7R, 551-7R, and 552-7R turboprop engines, installed on but not limited to Fokker Aircraft B.V. F27 series and Maryland Air Industries (formerly Fairchild) F-27 and FH-227 series airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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