# SDR ASAA2017120522786

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 5, 2017
- Submitted: December 11, 2017
- Operation: Air carrier
- Aircraft: [N442AS](https://openairdocs.org/aircraft/N442AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43293
- Aircraft time: 16,051 hours, 5,295 cycles
- System (JASC): [4960 · APU Controls](https://openairdocs.org/jasc/4960)
- Part: Sensor
- Part number: 38762272
- Condition: Faulted
- Location: Apu
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017120522786

## Discrepancy

APU FAULT LIGHT ILLUMINATED APU AUTO SHUT DOWN. GROUNDED - YES. PER B737-900 FIM 49-50 TASK 801 REMOVED & REPLACED DELTA PRESSURE SENSOR REF B737-900 AMM 49-52-33. OPS CK GOOD. APU RUNS & DOES NOT AUTO SHUTDOWN. BLEED AIR OPERATIVE. NO FAULTS FOUND IN CURRENT STATUS. PERFORMED OPS CK OF INLET GUIDE VANE. LEAK CK GOOD. REF AMM 49-52-12-400-801. RMVD MEL 49-1B.

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