What was found
AT FL 37.0 NR 3 ENGINE COMPRESSOR STALLED, ALL PARAMETERS NORMAL. OPS OK AT LOWER ALTITUDE. BORESCOPE PER MM 72-00-00 PG 680P, NO FINDINGS. FOUND 8TH STAGE CHECK VALVE FAILED. REPLACED SAME, OPS NORMAL PER 36-11-02.
- Difficulty date
- September 9, 2005
- Submitted
- September 13, 2005
- Operation
- Air carrier
- Aircraft
- N508MC
- Make and model
- Boeing 747230B
- Aircraft serial
- 21644
- Aircraft time
- 98,579 hours, 18,300 cycles
- Engine
- Ge CF650E2
- Engine time
- 56,786 hours, 12,177 cycles
- System (JASC)
- 7500 · Engine Bleed Air System
- Part
- Check Valve
- Part number
- 77385619
- Part serial
- 95061
- Condition
- Failed
- Location
- Nr 3 Engine
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- R, J
- Precautionary procedure
- B
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.