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Wed, May 24, 2006

AD: Rolls-Royce

AD NUMBER: 2006-11-05
MANUFACTURER: Rolls Royce
SUBJECT: Airworthiness Directive 2006-11-05
SUMMARY:
The FAA is superseding an existing airworthiness directive (AD) for Rolls-Royce plc (RR) RB211-22B series, RB211-524B, -524C2, -524D4, -524G2, -524G3, and -524H series, and RB211-535C and -535E series turbofan engines with high pressure compressor (HPC) stage 3 disc assemblies, part numbers (P/Ns) LK46210, LK58278, LK67634, LK76036, UL11706, UL15358, UL22577, UL22578, and UL24738 installed. This AD requires removing from service certain disc assemblies before they reach their full published life if not modified with anticorrosion protection.This AD results from the manufacturer's reassessment of the corrosion risk on HPC stage 3 disc assemblies that have not yet been modified with sufficient application of anticorrosion protection.We are issuing this AD to prevent corrosion-induced uncontained disc failure, resulting in damage to the airplane.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/

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