AD Amdt-39-9970
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce | plc RB | Airworthiness Directives; Rolls-Royce plc RB.211 Trent 800 Series Turbofan Engines |
Unsafe Condition
Loss of oil from the angle drive upper shroud tube, intermediate gearbox housing (IGH), and external gearbox lower bevel box (LBB) housing, and bearing failures.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct initial and repetitive visual and fluorescent penetrant inspections (FPI) for frettage and cracking on the angled drive upper shroud tube, conduct initial and repetitive visual inspections and FPI for cracking on the intermediate gearbox housing (IGH), perform a one-time FPI for porosity on the IGH, conduct initial and repetitive visual inspections for cracking on the external gearbox lower bevel box (LBB) housing, and perform initial and repetitive master magnetic chip detector inspections. Install a redesigned angled drive upper shroud tube and a lower splitter fairing with revised sealing prior to ETOPS or before September 30, 1997.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight or within specified inspection intervals.
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Affected Aircraft
Rolls-Royce plc RB.211 Trent 800 series turbofan engines.
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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