What was found
SILENT SURGE DETECTED - NR 1 ENGINE. MM BORESCOPED ENGINE AND FOUND NUMEROUS STAGE-8 AND STAGE-9 HP COMPRESSOR BLADES DAMAGED, WITH PIECES MISSING AND BENT AIRFOILS. THE ENGINE WAS REPLACED PRIOR TO FURTHER FLIGHT.
- Difficulty date
- December 26, 2008
- Submitted
- December 31, 2008
- Operation
- Air carrier
- Aircraft
- N204UA
- Make and model
- Boeing 777222
- Aircraft serial
- 28713
- Aircraft time
- 44,683 hours, 6,457 cycles
- Engine
- Pwa PW40903
- Engine time
- 42,763 hours, 6,596 cycles
- System (JASC)
- 7230 · Turbine Engine Compressor Section
- Part
- Compressor
- Part serial
- 22130
- Condition
- Damaged
- Location
- Nr 1 Engine
- Stage of operation
- CR
- 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.