# SDR ASAA2022010137069

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 2022
- Submitted: January 7, 2022
- Operation: Air carrier
- Aircraft: [N583AS](https://openairdocs.org/aircraft/N583AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35681
- Aircraft time: 50,425 hours, 14,709 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Sensor
- Part number: MS280341
- Condition: Shorted
- Location: Apu Inlet
- Stage of operation: TX
- 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/ASAA2022010137069

## Discrepancy

APU WONT START, FAULT LIGHT ON AFTER START ATTEMPT. GROUNDED - YES. PERFORMED BITE TEST AND FOUND MAINT MSG 49-61223. "INLET TEMPERATURE SENSOR SHOWS SHORT CIRCUIT". T/S TO INLET TEMP SENSOR IAW B737-800 FIM 49-60 TAK 812. REPLACED INLET TEMP SENSOR IN REF TO B737-800 AMM 49-61-31, OPS GOOD NO FAULT CODES NOTED.

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