# SDR ASAA2017122723070

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 27, 2017
- Submitted: January 3, 2018
- Operation: Air carrier
- Aircraft: [N585AS](https://openairdocs.org/aircraft/N585AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35683
- Aircraft time: 39,487 hours, 11,813 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Apu
- Part number: 38007021
- Part serial: P5859
- Condition: Oil Consumption
- Part time: 21,492 hours, 34,070 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/ASAA2017122723070

## Discrepancy

APU HAS A HISTORY OF GREATER THAN EXPECTED OIL CONSUMPTION.  PREVIOUS TROUBLESHOOTING HAS FOUND NO EVIDENCE OF EXTERNAL LEAKAGE.  ACFT GROUNDED.  REPLACED THE APU IAW T/C 78349010. LEAK AND OPS CHECKED GOOD.

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