AD 2011-22-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Rolls-Royce plc RB211-524 Series, RB211-Trent 700 Series, and RB211-Trent 800 Series Turbofan Engines |
| engine | Rolls-Royce | plc RB211-524 Series | Airworthiness Directives; Rolls-Royce plc RB211-524 Series, RB211-Trent 700 Series, and RB211-Trent 800 Series Turbofan Engines |
Unsafe Condition
Cracking has been found on the inner wall between intermediate dilution chutes on front combustion liners, with lives confirmed to be below the currently valid borescope inspection interval. Crack propagation could result in hot gas breakout, downstream component distress, and multiple turbine blade release beyond containment capabilities.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the front combustion liner for cracks using a borescope. Revise the initial and repeat borescope inspection intervals for the front combustion liner as specified in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 250 cycles after the effective date of the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Rolls-Royce plc RB211-524 Series, RB211-Trent 700 Series, and RB211-Trent 800 Series Turbofan Engines, excluding the RB211-535E4-37, RB211-535E4-B-37, RB211-535E4-C-37, and RB211-535E4-B-75 engine models.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.