- Difficulty date
- April 4, 2011
- Submitted
- April 27, 2011
- Operation
- Air carrier
- Make and model
- Boeing 777222
- Aircraft serial
- 26948
- Aircraft time
- 62,166 hours, 9,068 cycles
- Engine
- Pwa PW40903
- Part
- Controller
- Part number
- S351W200100
- Part serial
- 29
- Condition
- Failed
- Location
- Apu
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU BLEED AIR STS MSG. MAINTENANCE MESSAGE: 49-11 290. APU CHECK VALVE FAILED OPEN. VALVE SHOWS XX WHEN CLOSED CORRECT INDICATION WHEN OPEN. SUSPECT VALVE AS STATED. AHM CONFIRMS CHECK VALVE FAILURE (PCN: 295-1003). REPLACED CHECK VALVE AND ALSO APUC. OPS CHECKS GOOD ON GROUND IAW AMM.