# SDR AALA202511254203

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 24, 2025
- Submitted: November 26, 2025
- Operation: Air carrier
- Aircraft: [N902NN](https://openairdocs.org/aircraft/N902NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31154
- Aircraft time: 38,523 hours, 16,831 cycles
- Engine: Cfmint CFM567B242
- System (JASC): [7510 · Engine Anti-Icing System](https://openairdocs.org/jasc/7510)
- Part: Anti-Ice Valve
- Condition: Faulted
- Location: Lt Engine
- Stage of operation: DE
- 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/AALA202511254203

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: DURING DESCENT WITH ENGINE ANTI-ICE ON, THE LEFT ENGINE SHOWED AN AMBER TAI LIGHT, WITH A BRIGHT BLUE COWL VALVE OPEN LIGHT. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT IND.  (OPEN).

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