# SDR ASAA12511116

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 20, 2012
- Submitted: February 21, 2012
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 21,791 hours, 6,484 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7261 · Turbine Engine Oil System](https://openairdocs.org/jasc/7261)
- Part: Filter
- Part number: 41F9003
- Condition: Failed
- Location: Nr 1 Engine Oil
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA12511116

## Discrepancy

NR 1 ENGINE OIL IS SHOWING SIGNS OF FOAMING.  OBTAINED OIL SAMPLE PER MM 12-13-11.  DRAINED AND REFILLED NR 1 ENGINE OIL TANK REF MM 12-13-11.  REPLACED NR 1 SCAVENGE FILTER PER MM 79-21-06 AND NR 1 MAIN OIL FILTER PER MM 79-21-03.  RAN ENGINE.  NO LEAKS NOTED.

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