# SDR CALA2013081390409

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2013
- Submitted: August 14, 2013
- Operation: Air carrier
- Aircraft: [N225UA](https://openairdocs.org/aircraft/N225UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30554
- Aircraft time: 48,679 hours, 5,873 cycles
- Engine: Pwa PW40903
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Pressure Sensor
- Part number: 3046432
- Condition: Malfunctioned
- Location: Apu
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2013081390409

## Discrepancy

APU DATA MEMORY MODULE HAS 76 STRAIGHT HITS IN MAT.  INSTALLED APU DIFFERENTIAL PRESSURE SENSOR IAW AMM 49-53-04.  NO ACTIVE FAULTS AFTER MAT AND OPS CHECK.

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