# SDR COZA20140320040

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 2014
- Submitted: March 21, 2014
- Operation: Air carrier
- Aircraft: [N737KA](https://openairdocs.org/aircraft/N737KA), registered now
- Make and model: Boeing 737-7BX
- Registry model: [Boeing 737-7BX](https://openairdocs.org/model/boeing-737-7bx) (OpenAirDocs)
- Aircraft serial: 30740
- Aircraft time: 26,752 hours, 16,577 cycles
- System (JASC): [3421 · Attitude Gyro and Indicating System](https://openairdocs.org/jasc/3421)
- Part: Tat Probe
- Part number: 102AH2AG
- Part serial: A53766
- Condition: Intermittent
- Location: Zone 100
- Stage of operation: CR
- How discovered: O
- Nature of condition: S
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/COZA20140320040

## Discrepancy

WHITE MESSAGE "A/T LIM" ON UPPER DISPLAY UNIT.  TAT PROBE SIGNAL FAIL MAINTENANCE MESSAGE WAS FOUND DURING TROUBLESHOOTING USING THE FIM.  TAT PROBE WAS REPLACED AND SYSTEM CHECKED NORMAL.

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