What was found
APU DUCT PRESSURE LOW. REMOVED AND REPLACED AIR SUPPLY BITE MODULE, NO HELP, APU DUCT PRESS STILL LOW. LOCKED OUT VALVE. IAW AMM 36-11-00 REMOVED AND REPLACED APU SURGE CONTROL VALVE IAW AMM 49-53-01. OPS CHECKED GOOD.
- Difficulty date
- June 17, 2020
- Submitted
- June 18, 2020
- Operation
- Air carrier
- Aircraft
- N640GT
- Make and model
- Boeing 7673S1
- Aircraft serial
- 25221
- Aircraft time
- 91,192 hours, 19,420 cycles
- System (JASC)
- 4950 · APU Bleed Air System
- Part
- Valve
- Part number
- 97980612
- Part serial
- P168C
- Condition
- Malfunctioned
- Location
- Apu Duct
- 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.