# SDR ASAA2018020823463

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 8, 2018
- Submitted: February 9, 2018
- Operation: Air carrier
- Aircraft: [N442AS](https://openairdocs.org/aircraft/N442AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43293
- Aircraft time: 16,736 hours, 5,546 cycles
- System (JASC): [3150 · Central Warning](https://openairdocs.org/jasc/3150)
- Part: Fault Message
- Condition: False Activation
- 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/ASAA2018020823463

## Discrepancy

WHILE ACCOMPLISHING T/C 78273000, FOUND FAULTS 73-21351 AND 73-31351, APL VOLTAGE INPUT TO THE EEC IS OUT OF RANGE, NO GO. ACFT GROUNDED.  EEC BITE SHOWS FAULT LOGGED ON LEG 0, IAW AMM 73-21-00.  ACCOMPLISHED EEC TEST, NO FAULTS FOUND IAW AMM 73-21-00-804-F00.  SUSPECT FAULT DUE TO MOMENTARY POWER LOSS DUE TO A NOTHER FAULT LOGGED ON SAME LEG.  NO OTHER INSTANCES OF THIS FAULT IN HISTORY IAW FIM 73-22 TASK 808.

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