# SDR HALA2015013100015

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 2015
- Submitted: February 2, 2015
- Operation: Air carrier
- Aircraft: N588HA
- Make and model: Boeing 737-300
- Registry model: [Boeing 737-300](https://openairdocs.org/model/boeing-737-300) (OpenAirDocs)
- Aircraft serial: 33466
- Aircraft time: 47,632 hours, 8,549 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Gcu
- Condition: Malfunctioned
- Location: Apu
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HALA2015013100015

## Discrepancy

FOUND RT ENGINE FIELD LIGHT ON.  TROUBLESHOT DOWN TO GCU BY SWAPPING APU GCU AND NR 2 GCU LIGHT FOLLOWED TO APU AND NR 2 REMAINED OFF.  REPLACED NR 2 ENG GCU IAW AMM 24-22-02/401.  OPS CHECKED OK.

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