AD NUMBER: 2008-11-16
MANUFACTURER: Rolls Royce
SUBJECT: Airworthiness Directive 2008-11-16 SUMMARY: The FAA is
superseding an existing airworthiness directive (AD) for RR RB211
Trent 553-61, 553A2-61, 556-61, 556A2-61, 556B-61, 556B2-61,
560-61, and 560A2-61 turbofan engines.
That AD currently requires removing certain serial-numbered
intermediate pressure compressor (IPC) drums, part number (P/N)
FK30102. This AD requires removing those same IPC drums, and
requires a new reduced life limit for all other IPC drums, P/N
This AD results from an RR engineering assessment that it is
necessary to reduce the cyclic lives of the other drums with the
We are issuing this AD to prevent uncontained loss of IPC stage
1 blades, whichcould result in damage to the airplane.