# SDR ASAA2015101113470

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 11, 2015
- Submitted: October 13, 2015
- Operation: Air carrier
- Aircraft: [N483AS](https://openairdocs.org/aircraft/N483AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36350
- Aircraft time: 273 hours, 95 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7261 · Turbine Engine Oil System](https://openairdocs.org/jasc/7261)
- Part: Transmitter
- Part number: QA07656ISS1
- Condition: Failed
- Location: Nr 1 Oil Filter
- Stage of operation: TX
- How discovered: O
- Nature of condition: N
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015101113470

## Discrepancy

DURING TAXI OUT, LT ENGINE OIL FILTER BYPASS LIGHT ILLUMINATED ABOUT 10 SECS, THEN WENT OUT. LT ENGINE OIL PRESSURE 23-26, OIL TEMP WAS 76, OIL QTY 16-17.  ACFT GROUNDED.  PERFORMED ELECTRONIC ENGINE CONTROL BITE, MSG 79-31121, OIL FILTER SIGNAL DISAGREE.  ACCOMPLISHED FIM 79-21, TASK 806.  FOUND CLOG FILTER TRANSMITTER RESISTANCE OUT OF LIMITS.  R & R NR 1 ENGINE SCAVENGE OIL FILTER CLOGGING TRANSMITTER.  PERFORMED IDLE LEAK CHECK. NO LEAKS NOTED.  NO FAULTS PRESENT, REF AMM 79-21-07 AND 71-00-00.

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