# SDR P5CA0601430

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 13, 2006
- Submitted: January 27, 2006
- Operation: Air carrier
- Aircraft: N920FT
- Make and model: Boeing 747249F
- Aircraft serial: 22237
- Aircraft time: 80,073 hours, 19,371 cycles
- System (JASC): [3423 · Magnetic Compass](https://openairdocs.org/jasc/3423)
- Part: Coupler
- Part number: 2591201911
- Part serial: 85026452CX
- Condition: Failed
- Location: Nr 1 Compass
- Stage of operation: CR
- 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/P5CA0601430

## Discrepancy

CAPTAIN'S COMPASS SYSTEM HAS TO BE SLAVED EVERY 10 MINUTES.  APPEARS THE COMPASS FLUX VALVE IS INOP.  REMOVED AND REPLACED NR 1 COMPASS COUPLER AS PER MM 34-21-03.  OPS CHECK OK.

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