# SDR ASAA2015060912044

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 9, 2015
- Submitted: June 15, 2015
- Operation: Air carrier
- Aircraft: [N516AS](https://openairdocs.org/aircraft/N516AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39044
- Aircraft time: 24,624 hours, 7,597 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7920 · Engine Oil Distribution (Airframe Furnished)](https://openairdocs.org/jasc/7920)
- Part: Warning Light
- Condition: Illuminated
- Location: Nr 1 Engine Oil
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015060912044

## Discrepancy

AFTER LANDING, OIL FILTER BYPASS LIGHT ILLUMINATED ON NR 1 ENGINE ALL OTHER INDICATIONS NORMAL.  ACFT GROUNDED. PARTIALLY REMOVED NR 1 OIL SCAVENGE FILTER BOWL, DURING REMOVAL BOWL THREADS SEIZED ON HOUSING, REF MM 79-21-06. COMPLETED REMOVAL OF NR 1 ENG OIL SCAVENGE FILTER ASSY AND INSTALLED REF AMM TASK 79-21-04. INSTALLED DIFFERENTIAL PRESSURE SWITCH CLOGGING TRANSMITTER TASK 79-21-07 AND NEW FILTER ASSY IN BOWL.  PERFORMED LEAK CHECK, NO LEAKS NOTED.  EMCS CDU BITE NO FAULTS IAW AMM 79-21, TASK 806 & TABLE 71-00-00, NO BY PASS LIGHT NOTED NR 1 ENGINE.

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