# SDR ASAA2018020423438

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 4, 2018
- Submitted: February 8, 2018
- Operation: Air carrier
- Aircraft: [N569AS](https://openairdocs.org/aircraft/N569AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35184
- Aircraft time: 41,597 hours, 12,747 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Alternator
- Part number: 9387M17P09
- Part serial: HTL21088
- Condition: Faulted
- Location: Nr 1 Engine
- Part time: 41,644 hours, 12,761 cycles
- 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/ASAA2018020423438

## Discrepancy

NR 1 ENGINE FAULT FOUND AT FMC CDU, RECENT SHORT TIME MESSAGE CODE 73-11271.   THE ALTERNATOR VOLTAGE INPUT TO THE EEC IS OUT OF RANGE.  ACFT GROUNDED.  REMOVED & REPLACED THE NR 1 ENGINE EEC, ALTERNATOR, & ROTOR IAW AMM 73-21-08. OPS & LEAK CHECKED GOOD.

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