# SDR UALA2013032501875

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 22, 2013
- Submitted: April 25, 2013
- Operation: Air carrier
- Aircraft: N552UA
- Make and model: Boeing 757222
- Aircraft serial: 26641
- Aircraft time: 79,818 hours, 23,050 cycles
- Engine: Pwa PW2037
- System (JASC): [4930 · APU Engine Fuel and Control](https://openairdocs.org/jasc/4930)
- Part: Fcu
- Condition: Faulty
- Location: Apu
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2013032501875

## Discrepancy

REPLACED APU FLOW SENSING MODULE REF DF676 APU AUTO SHUTDOWN.  REPLACED FLOW SENSING MODULE, NO HELP ACC.  APU DEEP BITE TEST FAULTS SHOW DELTA P, FUEL CONTROL UNIT, DE-OILER SOLENOID, HOT SENSOR AND P2 SENSOR

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