What was found
NR 2 ENGINE EXPERIENCED A COMPRESSOR STALL AND N1 ROLLBACK. ENGINE EXPERIENCED A SURGE AT HIGH EPR NOT AT TAKEOFF ( NO GROUP 3). EICAS MESSAGE SVA FAIL. REMOVED ENGINE SENT TO TEST CELL AND FOUND SVA BINDING. CHANGED SVA.
- Difficulty date
- July 3, 2003
- Submitted
- July 15, 2003
- Operation
- Air carrier
- Aircraft
- N179UA
- Make and model
- Boeing 747422
- Aircraft serial
- 25158
- Aircraft time
- 52,174 hours, 6,563 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 7230 · Turbine Engine Compressor Section
- Part
- Compressor
- Condition
- Stalled
- Location
- Nr 2 Engine
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- R, E
- Precautionary procedure
- E, A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.