# SDR Q2SA746012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 20, 2009
- Submitted: August 20, 2009
- Operation: Air carrier
- Aircraft: N746SA
- Make and model: Boeing 747206B
- Aircraft serial: 21111
- Aircraft time: 134,090 hours, 23,794 cycles
- System (JASC): [2433 · DC Rectifier/Converter](https://openairdocs.org/jasc/2433)
- Part: Rectifier
- Part number: 241805
- Condition: Failed
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: F, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/Q2SA746012

## Discrepancy

DURING CLIMBOUT OF OHSJ, CREW SMELLED ELECTRICAL SMOKE, RAN CHECKLIST AND FOUND SMOKE COMING FROM ESSENTIAL TRANSFORMER RECTIFIER.  COCKPIT PORTABLE FIRE EXTINGUISHER USED AS PRECAUTION.  CREW EXECUTED A SAFE AIR TURNBACK TO DEPARTURE AIRPORT OHSJ.

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