What was found
TURBINE RECEIVED FROM FIELD FOR HOWLING NOISE. REMOVED COMBUSTION SECTION AND FOUND SULFADATION ON 1ST STAGE WHEEL. THIS TURBINE HAD A ROLLS ROYCE COMBUSTION LINER. WHEEL HAS MISSING AND BROKEN BLADES DUE TO SULFADATION. (M)
- Difficulty date
- August 10, 2001
- Submitted
- October 31, 2001
- Operation
- Air carrier
- Aircraft
- N687AL
- Make and model
- Bell 407
- Aircraft serial
- 53366
- Engine
- Allsn 250C47B
- System (JASC)
- 7250 · Turbine Section
- Part
- Turbine Wheel
- Part number
- 23053299
- Part serial
- X146539
- Condition
- Corroded
- Location
- Turbine
- Part time
- 1,706 hours
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.