# SDR ASAA2015010410148

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 4, 2015
- Submitted: January 6, 2015
- Operation: Air carrier
- Aircraft: [N433AS](https://openairdocs.org/aircraft/N433AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41704
- Aircraft time: 4,685 hours, 1,496 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7920 · Engine Oil Distribution (Airframe Furnished)](https://openairdocs.org/jasc/7920)
- Part: Transmitter
- Part number: QA07656ISS1
- Condition: Failed
- Location: Filter
- Stage of operation: TX
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015010410148

## Discrepancy

AFTER LANDING NR 1 ENGINE OIL FILTER BYPASS LIGHT ILLUMINATED.  ACFT GROUNDED. PERFORMED BITE CHECK, NOTED MSG 79-31121 OIL FILTER SIGNAL DISAGREE NR 1 ENGINE.  REF TASK 79-05, TASK 817.  PERFORMED TASK 79-21, TASK 806, H, 1-10 NO DEFECTS NOTED.  PERFORMED FIM TASK 79-21, TASK 806 AND FIM TASK 79-21, TASK 817, FOUND FILTER BYPASS NOT CLOGGED.  FIM TASK 79-21, TASK 806 LINE H, NR 11 REPLACE OIL FILTER CLOGGING TRANSMITTER. NO LEAKS OR FAULTS NOTED.  REF AMM 79-21-07-400-801-F00.

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