# SDR ASAA2019092530824

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 25, 2019
- Submitted: September 26, 2019
- Operation: Air carrier
- Aircraft: [N434AS](https://openairdocs.org/aircraft/N434AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 61620
- Aircraft time: 14,167 hours, 4,515 cycles
- System (JASC): [3412 · Outside Air Temperature Indicator/Sensor](https://openairdocs.org/jasc/3412)
- Part: Probe
- Part number: 102AH2AG
- Condition: Inoperative
- Location: Tat
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019092530824

## Discrepancy

LEVEL AT FL320 ENROUTE TO JNU RECEIVED MASTER CAUTION AND TEMP PROBE FOLLOWED QRH AND RETURNED TO SEA. GROUNDED - YES. AIR TURNBACK. DIVERSION TIME 78 MINUTES - TROUBLESHOT AND FOUND TAT PROBE TO BE FAILING REPLACED TAT PROBE PER AMM 34-21-06 AND OPS CHECKED GOOD.

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