# SDR USAA2014010200005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 31, 2013
- Submitted: January 2, 2014
- Operation: Air carrier
- Aircraft: [N507AY](https://openairdocs.org/aircraft/N507AY), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3712
- Aircraft time: 19,707 hours, 6,359 cycles
- System (JASC): [2440 · External Power System](https://openairdocs.org/jasc/2440)
- Part: Control Unit
- Part number: 1700667D
- Part serial: AADU003325
- Condition: Malfunctioned
- Location: External Power
- Part time: 15,060 hours, 5,954 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2014010200005

## Discrepancy

AFTER GND POWER HOOKED UP, STRONG SMELL OF BURNING AS SMOKE IN THE FLIGHT DECK, GPU BREAKER POPPED.  REPLACED GPCU IAW A321 AMM 24-41-00-740-002-B.

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