What was found
APU HAD SHUTDOWN, FAULT LGT ILLUM AND EICAS MSG. APU FAULT DISPLAYED. APU INOP. FOUND DELTA P AND P2 SENSOR FAULTS ON ECU. REPLACED FLOW SENSE MODULE AND RAN APU FOR 20 MINUTES. OPS CHECK OK.
- Difficulty date
- December 11, 2009
- Submitted
- December 21, 2009
- Operation
- Air carrier
- Aircraft
- N590UA
- Make and model
- Boeing 757222
- Aircraft serial
- 28708
- Aircraft time
- 47,771 hours, 13,249 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 4900 · Airborne Auxiliary Power Unit (APU) System
- Part
- Module
- Part number
- 36181531
- Part serial
- 35
- Condition
- Faulted
- Location
- Apu
- Stage of operation
- NR
- 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.