# SDR 2004UALA00267

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 21, 2004
- Submitted: March 30, 2004
- Operation: Air carrier
- Aircraft: [N937UA](https://openairdocs.org/aircraft/N937UA), registered now
- Make and model: Boeing 737522
- Aircraft serial: 26668
- Aircraft time: 33,070 hours, 20,943 cycles
- Engine: Ge CFM56*
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Odor
- Condition: Detected
- Location: Cockpit
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2004UALA00267

## Discrepancy

RETURNED TO FIELD UNDER AMBER ALERT DUE TO A BURNING ODOR IN COCKPIT.  CHECKED BEHIND P6-3 PANEL, FOUND WIRE ON R4 APPEARING TO BE BURNT. UPPER ROW OF WIRES THIRD FROM OTBD, WAS BLUE NOW BLACK. RELAY R4 AND REPAIRED BURNED CONNECTOR.

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