AD NUMBER: 2007-22-08
MANUFACTURER: Rolls Royce
SUBJECT: Airworthiness Directive 2007-22-08 SUMMARY: We are adopting a
new airworthiness directive (AD) for the products listed above.
This AD results from mandatory continuing airworthiness information
(MCAI) provided by the aviation authority for the United Kingdom to
identify and correct an unsafe condition on an aviation product.
The MCAI states the following: This action is necessary following
the discovery of IP Compressor Rotorstage 2-3 interstage spacer
cracking on an in-service Trent 700 engine. Stress analysis of the
damaged rotor has shown a possible threat to the rotor integrity,
the cracking therefore presents a potential unsafe condition. The
cause of the cracking is currently under investigation. We are
issuing this AD to detect cracks in the stage 2-3 interstage spacer
of the intermediate pressure (IP) Compressor rotor. Cracking of the
stage 2-3 interstage spacer could result in an uncontained engine
failure and damage to the airplane.