# SDR 2006UALA01604

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 16, 2006
- Submitted: August 22, 2006
- Operation: Air carrier
- Aircraft: [N220UA](https://openairdocs.org/aircraft/N220UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30223
- Aircraft time: 20,400 hours, 2,742 cycles
- Engine: Pwa PW4090
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Odor
- Condition: Detected
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2006UALA01604

## Discrepancy

BURNING ELECTRICAL ODOR THROUGHOUT AIRCRAFT.  APU OFF.  GROUND POWER SUPPLIED.   AFTER TROUBLESHOOTING, REPLACED BUSS POWER CONTROL UNIT.  OPERATES NORMALLY.  SUSPECT INTERNAL CIRCUIT FLR IN BPCU.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.