# SDR MYWA120010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 23, 2012
- Submitted: January 31, 2012
- Operation: Air carrier
- Aircraft: N733MA
- Make and model: Boeing 737-81Q
- Registry model: [Boeing 737-81Q](https://openairdocs.org/model/boeing-737-81q) (OpenAirDocs)
- Aircraft serial: 30819
- Aircraft time: 28,360 hours, 10,250 cycles
- System (JASC): [2420 · AC Generation System](https://openairdocs.org/jasc/2420)
- Part: Unknown
- Condition: Malfunctioned
- Location: Electrical Sys
- Stage of operation: IN
- 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/MYWA120010

## Discrepancy

ETOPS SIGNIFICANT SYSTEM:  DURING ENGINE RUN UP GENERATOR NR 1 SOURCE OFF LIGHT ILLUMINATES.  FOR T/S PURPOSES SWAPPED GCU BETWEEN APU AND NR 1 GEN GCU OPS CKS NORMAL FOR APU AND GEN GCU APU GCU P/N 76215F/ S/N 2792 GEN GCU P/N 762185F S/N 2731 IAW 737-800 FIM 24-21 TASK 801.

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