# SDR UPS05443937

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2005
- Submitted: February 28, 2005
- Operation: Air carrier
- Aircraft: N683UP
- Make and model: Boeing 747121
- Aircraft serial: 20353
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Light
- Condition: Inoperative
- Location: Cockpit
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS05443937

## Discrepancy

F/E O2 REG INOP.  *S/D*  REMOVED AND REPLACED 02 REG BACKGROUND LIGHTS INOP.  FOUND WIRES BROKEN BEHIND FE'S OXY GEN REGULATOR. REPAIRED WIRES WITH REF TO BOEING STD WIRING PRAC MANUA L 20-10-13. LIGHTS OPERATED NORMAL AND PLACARD REMOVED. THIS CLEARS M297824.

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