# SDR CALA2013073090088

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 29, 2013
- Submitted: July 31, 2013
- Operation: Air carrier
- Aircraft: [N120UA](https://openairdocs.org/aircraft/N120UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 29166
- Aircraft time: 58,858 hours, 6,820 cycles
- Engine: Pwa PW4056
- System (JASC): [3797 · Vacuum System Wiring](https://openairdocs.org/jasc/3797)
- Part: Connector
- Condition: Melted
- Location: Vacuum Sys
- Stage of operation: IN
- How discovered: V
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2013073090088

## Discrepancy

3L VAC OUTLET BURNED DURING VACUUM OPERATION.  BACK OF CONNECTOR FOUND MELTED, CIRCUIT BREAKER PULLED AND COLORED WIRES INSULATED AND SECURED.

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