# SDR XN0A1359

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 2007
- Submitted: February 5, 2007
- Operation: Air carrier
- Aircraft: [N472AS](https://openairdocs.org/aircraft/N472AS), registered now
- Make and model: Airbus A300 B4-203
- Registry model: [Airbus A300 B4-203](https://openairdocs.org/model/airbus-industrie-a300-b4-203) (OpenAirDocs)
- Aircraft serial: 125
- Aircraft time: 44,280 hours, 22,000 cycles
- Engine: Ge CF650C2
- System (JASC): [2420 · AC Generation System](https://openairdocs.org/jasc/2420)
- Part: Gcu
- Condition: Faulted
- Location: Nr 2
- Stage of operation: TX
- How discovered: C
- Nature of condition: G
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/XN0A1359

## Discrepancy

NR 1 PITCH TRIM TRIPPED BEFORE TAXI.  ALL COCKPIT LIGHTS STARTED FLASHING WITH POWER-UP FOR TAXI.  LOST VSI INDICATORS TEMPORARILY.  LOST TAWS INDICATIONS. FOUND NR 1 GCU CAUSING POWER INTERRUPTIONS. R/R NR 1 GCU AND DISCONNECTED NR 2 CSD, OPS CK GOOD IAW AMM CHAPTER 22-12-34. (2) R/R NR 1 GCU AND DISCONNECTED NR 2 CSD, OPS CK GOOD IAW AMM CHAPTER 24-21-12.(3) R/R NR 1 GCU AND DISCONNECTED NR 2 CSD, OPS CK GOOD IAW AMM CHAPTER 34-11-50.  R/R NR 1 GCU AND DISCONNECTED NR 2 CSD, OPS CK GOOD IAW CMM ST3400.  WHILE T/S ITEMS NR 1 THRU NR 4, FOUND NR 2 ENGINE GCU FAULTY.  R/R NR 2 ENGINE GCU. CSD RECONNECTED, OPS CHECKS GOOD IAW AMM CHAPTER 24-21-12. DMI NR 7005 CLEARED. (STATUS:SUPP/CLOSED)

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