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AD: Rolls-Royce

AD NUMBER: 2008-18-08
MANUFACTURER: Rolls Royce
SUBJECT: Airworthiness Directive 2008-18-08
SUMMARY
: We are adopting a new airworthiness directive (AD) for the products listed above. This AD resultsfrom mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product.

The MCAI describes the unsafe condition as: This action is necessary following the discovery of IP Compressor Rotor rear balance land cracking on an in-service Trent 800 engine. Stress analysis of the damaged rotor has shown a possible threat to the rotor integrity, the cracking therefore presents a potential unsafe condition.

We are issuing this AD to detect cracking on the intermediate pressure (IP) compressor rotor rear balance land. IP compressor rotor rear balance and cracking can lead to uncontained failure of the rotor and damage to the airplane.

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

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