# SDR ASAA2019061769712

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 16, 2019
- Submitted: June 17, 2019
- Operation: Air carrier
- Aircraft: [N492AS](https://openairdocs.org/aircraft/N492AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44110
- Aircraft time: 14,341 hours, 4,724 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Sensor
- Part number: 38762983
- Part serial: 1516222106825
- Condition: Inoperative
- Location: Apu Oil Level
- Part time: 4,340 hours, 8,360 cycles
- 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/ASAA2019061769712

## Discrepancy

APU OIL QTY READS UNKNOWN WITH APU SHUT DOWN. GROUNDED - YES. CHECKED OIL QTY ON APU SIGHT GAUGE AND FOUND OIL 2 QTS LOW. REPLACED OIL LEVEL SENSOR PER B737-900 AMM 49-94-11. LK AND OPS CK GOOD. ETOPS GROUND VERIFICATION SUCCESSFUL.

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