# SDR ASAA2023022442083

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 24, 2023
- Submitted: February 27, 2023
- Operation: Air carrier
- Aircraft: [N493AS](https://openairdocs.org/aircraft/N493AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41727
- Aircraft time: 25,025 hours, 7,857 cycles
- System (JASC): [3440 · Independent Position Determining System](https://openairdocs.org/jasc/3440)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: TO
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023022442083

## Discrepancy

PREDICTIVE WINDSHEAR ALERT FAIL (PWS FAIL) DURING TAKE OFF ROLL. RADAR WORKED GOOD IN CRUISE. GROUNDED - YES. ACCOMP B737-900 FIM 34-43 TASKS 815 & 801, SYS OPS CKS NML PER SAME. GROUND VERIFICATION SUCCESSFUL.

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