# SDR ASAA2018011823241

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 18, 2018
- Submitted: January 23, 2018
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 44,596 hours, 13,156 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil System
- Condition: Low
- Location: Apu
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018011823241

## Discrepancy

APU MAINT BLUE LITE CAME ON DURING START. GROUNDED - YES. ACCOMPLISHED FIM 49-90 TASK 804. PERFORMED APU BITE CK FOUND FAULT 49-91227 OIL QTY LOW. CKD APU OIL SIGHT GLASS QTY LOW. ADDED 1.5 QTS REF AMM 12-13-31-610-803. RAN APU BLUE LIGHT OFF.

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