AD 2008-22-24
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce | plc RB211-535E4-37 | Airworthiness Directives; Rolls-Royce plc RB211-535E4-37, RB211-535E4-B-37, and RB211-535E4-B-75 Series Turbofan Engines |
Unsafe Condition
Cracks in low pressure compressor (LPC) fan blade roots, which if not detected, could lead to uncontained multiple fan blade failure and damage to the airplane.
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Required Actions
Initial and repetitive ultrasonic inspections of installed LPC fan blade roots on-wing and during overhaul. Relubrication according to accumulated life cycles. Compliance paragraphs added to relax repetitive inspection schedules for fan blades operating within RB211-535E4 flight profiles A and B, if certain requirements are met. Extended cycles for initial inspections based on relaxed thresholds.
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Compliance Time
Within 12 months of effective date (December 9, 2008).
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Affected Aircraft
Rolls-Royce plc RB211-535E4-37, RB211-535E4-B-37, and RB211-535E4-B-75 series turbofan engines.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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