What was found
APU AIR PRESSURE DROPS TO 10 PSI AND STAYS AT 10 PSI DURING START. REMOVED AND REPLACED APU SURGE CONTROL VALVE IAW AMM 49-53-01, OPS AND LEAK CHECKED GOOD.
- Difficulty date
- July 28, 2020
- Submitted
- July 31, 2020
- Operation
- Air carrier
- Aircraft
- N1427A
- Make and model
- Boeing 767306
- Aircraft serial
- 28098
- Aircraft time
- 81,646 hours, 17,721 cycles
- System (JASC)
- 4950 · APU Bleed Air System
- Part
- Control Valve
- Condition
- Failed
- Location
- Apu
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.