# SDR ASAA2023090344911

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 3, 2023
- Submitted: September 5, 2023
- Operation: Air carrier
- Aircraft: [N423AS](https://openairdocs.org/aircraft/N423AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35206
- Aircraft time: 37,766 hours, 11,969 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Sensor
- Part number: MS280343
- Condition: Faulty
- Location: Apu Oil Temp
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023090344911

## Discrepancy

APU FAULT LIGHT ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED APU OIL TEMP. SENSOR REF. AMM 49-94-21. OPS CHECK GOOD. LEAK CHECK GOOD. RAN APU BITE, NO FAULT FOUND. OIL TEMP REMAIN 88' C UNDER LOAD. THIS CLEAR MEL 49-1B. SEAMC SCOTT NOTIFIED.

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