AD 2003-15-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce | plc Trent 768-60 | Airworthiness Directives; Rolls-Royce plc Trent 768-60, Trent 772-60, and Trent 772B-60 Turbofan Engines |
Unsafe Condition
Reports of low power surges indicate larger than anticipated high pressure compressor (HPC) tip clearances, leading to reduced surge margin and potential dual-engine in-flight surge, which could result in loss of control of the airplane.
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Required Actions
Perform initial surge margin testing using Rolls-Royce plc Service Bulletin No. RB.211-71-D509, Revision 2, for engines with specific cycle counts. Conduct repetitive surge margin testing at intervals not exceeding 130 cycles-since-last test.
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Compliance Time
Before further flight for engines with specified cycle counts; repetitive testing within 130 cycles-since-last test.
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Affected Aircraft
Rolls-Royce plc Trent 768-60, Trent 772-60, and Trent 772B-60 turbofan engines installed on, but not limited to, Airbus 330 series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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