What was found
TURBINE RUBBING SOUND DETECTED ON SHUTDOWN. TURBINE SECTION REMOVED FROM SERVICE FOR INSPECTION. INSPECTION FOUND NR 1 AND NR 2 TURBINE WHEELS RUBBING DUE TO NR 2 NOZZLE WARPING. BOTH TURBINE WHEELS AND NR 2 NOZZLE UNSERVICEABLE.
- Difficulty date
- April 25, 2012
- Submitted
- May 31, 2012
- Operation
- Air carrier
- Aircraft
- N407WH
- Make and model
- Bell 407
- Aircraft serial
- 53503
- Aircraft time
- 7,320 hours
- Engine
- Allsn 250C47B
- Engine time
- 7,384 hours, 6,958 cycles
- System (JASC)
- 7250 · Turbine Section
- Part
- Turbine Wheel
- Part number
- 23063354
- Part serial
- CAT45033
- Condition
- Failed
- Location
- Engine
- Part time
- 4,527 hours, 4,882 cycles
- Component
- Engine · Allsn
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.