FAA has issued an airworthiness directive (AD) requiring repetitive ultrasonic inspections of low-pressure (LP) compressor blades with more than 2,500 flight cycles since last inspection on Rolls-Royce RB211 Trent 768-60s, 772-60s and 772B-60s. FAA issued the AD to prevent LP compressor blade airfoil separations, damage to the engine and damage to the ...

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