What was found
APU BLEED AIR INSUFFICIENT TO RUN A PACK ON THE GROUND, 8 PSI DUCT PRESSURE. REMOVED AND REPLACED THE SURGE CONTROL VALVE AND PERFORMED AN APU OPERATIONAL CHECK. OK IAW AMM 49-53-01.
- Difficulty date
- August 1, 2017
- Submitted
- August 8, 2017
- Operation
- Air carrier
- Aircraft
- N644GT
- Make and model
- Boeing 7673JHF
- Aircraft serial
- 37810
- Aircraft time
- 11,110 hours, 2,713 cycles
- System (JASC)
- 4950 · APU Bleed Air System
- Part
- Valve
- Part number
- 97980612
- Part serial
- 343C
- Condition
- Failed
- Location
- Apu Surge
- Stage of operation
- TX
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.