- Difficulty date
- December 16, 2010
- Submitted
- January 31, 2011
- Operation
- Air carrier
- Make and model
- Boeing 777222
- Aircraft serial
- 26940
- Aircraft time
- 59,092 hours, 10,656 cycles
- Engine
- Pwa PW4077
- Part
- Check Valve
- Part number
- 32026105
- Condition
- Faulty
- Location
- Apu
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
3 START ATTEMPTS APU FAILED TO START. STARTED APU USING ACFT PNEUMATIC. DEFERRED ISSUE FOR FURTHER T/S IAW MEL 4942A AND COMPLIED WITH MAINT MSG 49-11290. CHECK VALVE, REF: FIM 49-52-00-810 TASK 808 "APU CHECK VALVE FAILED OPEN". REPLACED 2EA APU PNEU CLUSTER SENSORS: 'TOTAL PRESS' & 'INLET PRESS' SENSORS IAW MM. NEED REPAIR CONF CK IAW REF FIM TASK ITM 'E'. OPS CHECK GOOD IAW FIM.