AD 2011-13-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Rolls-Royce plc (RR) RB211-524 Series Turbofan Engines |
Unsafe Condition
Detachment of the TRU's fixed structure front ring rivet lines on the rear flange, associated with a previous translating cowl gearbox stubshaft fracture and repair to Engine Manual repair No. FRS5887, which may have weakened adjacent rivets.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the rivets adjacent to the repair area for damage or weakening. Replace any damaged or weakened rivets as necessary. Revise the maintenance program to include periodic inspections of these rivets.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 215 cycles-in-service (CIS) after the effective date of this AD for engines previously repaired using FRS4976 or FRS5887/FRS6669. Within 2,225 CIS after the effective date for engines repaired using FRS5887 only.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Rolls-Royce RB211-524 series turbofan engines, including models RB211-524D4-19, -524D4-B-19, -524D4-39, -524D4-B-39, -524D4X-19, -524D4X-B-19, -524H-36, -524H2-19, -524H-T-36, -524H2-T-19, -524G2-19, -524G3-19, -524G2-T-19, and -524G3-T-19, with thrust reverser units (TRUs) specified in RR Alert Service Bulletin RB.211-78-AG084, Revision 5.
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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