# SDR ASAA2018021223546

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 12, 2018
- Submitted: March 15, 2018
- Operation: Air carrier
- Aircraft: [N407AS](https://openairdocs.org/aircraft/N407AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41731
- Aircraft time: 20,864 hours, 6,770 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Fault Message
- Condition: False Activation
- Location: Nr 1 Engine
- Stage of operation: IN
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018021223546

## Discrepancy

FOUND A NR 1 ENGINE FAULT MESSAGE, 73-20771, LONG TIME FAULT, PS3 SIGNAL IS OUT OF RANGE.   ACFT GROUNDED.    RAN EEC BITE TEST FMC CDU FAULTS IAW AMM 73-21-00,  SYSTEM OP CHECKED GOOD,  NO DEFECTS NOTED.

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