- Difficulty date
- May 30, 2011
- Submitted
- June 2, 2011
- Operation
- Air carrier
- Aircraft
- N921WN
- Make and model
- Boeing 7377H4
- Aircraft serial
- 36626
- Aircraft time
- 10,905 hours, 6,560 cycles
- Engine
- Cfmint CFM567B243
- Part
- Hmu
- Part number
- 442369
- Part serial
- BECW3732
- Condition
- Faulty
- Location
- Nr 1 Engine
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- R
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERSION -- DURING CRUISE AT FL410, NR 1 ENGINE SOUND OF COMPRESSOR STALL. N1/N2 EGT ROLLED BACK - AUTOTHROTTLE DISCONNECTED N1 APPROX 30 PERCENT N2 APPROX 40 PERCENT EGT AT 300 DEG DECREASING. REMOVED AND REPLACED HMU & FUEL PUMP PER MT.