# SDR ASAA2016011014721

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 10, 2016
- Submitted: January 12, 2016
- Operation: Air carrier
- Aircraft: [N585AS](https://openairdocs.org/aircraft/N585AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35683
- Aircraft time: 32,247 hours, 9,660 cycles
- Engine: Cfmint CFM567B273B3
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Warning Message
- Condition: Activated
- Location: Engine
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016011014721

## Discrepancy

WHILE ACCOMPLISHING TASK CARD NR 78273000, INTEROGATE THE FMC CDU FOR ENGINE FAULTS, FOUND MSG NR: 73-31161, THE MECHANICAL OVERSPEED PROTECTION SIGNAL IS OUT OF RANGE, NR 1 ENGINE.  THIS IS A LONG TIME FAULT.  ACFT GROUNDED. ACCOMPLISHED FIM 73-21, TASK 801, INTERNAL ELECTRONIC ENGINE CONTROL FAULT AND ACCOMPLISHED NR 1 ENG ELECTRONIC ENGINE CONTROL TEST WITH NO FAULTS FOUND AND ACCOMPLISHED NR 1 ENGINE ACTUATORS TEST REF AMM 71-00-00-700-807-F00 WITH NO FAULTS FOUND.  NO OTHER DEFECTS NOTED.

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