# SDR AWXA200400300

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 22, 2004
- Submitted: March 23, 2004
- Operation: Air carrier
- Aircraft: N905AW
- Make and model: Boeing 757-2S7
- Registry model: [Boeing 757-2S7](https://openairdocs.org/model/boeing-757-2s7) (OpenAirDocs)
- Aircraft serial: 23567
- Aircraft time: 68,338 hours, 26,790 cycles
- System (JASC): [2350 · Audio Integrating System](https://openairdocs.org/jasc/2350)
- Part: Selector Panel
- Part number: 285T002239
- Part serial: D00410
- Condition: Shorted
- Location: Cockpit
- Part time: 41,042 hours, 16,266 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AWXA200400300

## Discrepancy

PHX - SMOKE - FLT 0052 - EN ROUTE FROM SJD TO PHX FLIGHT CREW NOTICED SMOKE EMANATING FROM BOOM / OXYGEN SWITCH ON NR 2 AUDIO SELECTOR PANEL, SMOKE STOPPED SHORTLY AFTER IT WAS NOTICED.  MAINTENANCE REMOVED AND REPLACED THE NR 2 AUDIO SELECTOR PANEL IAW BMM 23-51-01, OPERATIONAL CHECK WAS GOOD. VENDORS SHOP EVALUATION OF AUDIO SELECTOR PANEL S/N D00410 CONFIRMED REASON FOR REMOVAL FINDING RESISTOR (R1) AND CAPACITOR (C1) ON A2 CIRCUIT BOARD BURNED. REPLACED RESISTOR (R1) AND CAPACITOR (C1) ON A2 CIRCUIT BOARD, AND REPLACED OXYGEN / BOOM SWITCH PER E.O. 2350 01001. UNIT CLEANED, INSPECTED, AND TESTED IAW CMM 23-51-54, REV. 27.

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