# SDR DALA2026012700644

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 22, 2026
- Submitted: January 27, 2026
- Operation: Air carrier
- Aircraft: [N311DU](https://openairdocs.org/aircraft/N311DU), registered now
- Make and model: Airbus BD-500-1A11
- Registry model: [Airbus BD-500-1A11](https://openairdocs.org/model/airbus-canada-lp-bd-500-1a11) (OpenAirDocs)
- Aircraft serial: 55153
- Aircraft time: 10,980 hours, 4,855 cycles
- System (JASC): [3010 · Airfoil Anti/De-ice System](https://openairdocs.org/jasc/3010)
- Part: Anti-Ice Valve
- Condition: Failed
- Location: Zone 500
- Stage of operation: LD
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026012700644

## Discrepancy

DECLARED EMERGENCY DUE TO LT WING ANTI-ICE FAIL WARNING MESSAGE AND ALPHA LIMIT CAUTION MESSAGE IN ICING CONDITIONS.  R & R THE LT WING ANTI-ICE VALVE, TRANSDUCER, CDC 2 LRM 05, & LT OTBD WING SLAT HARNESS. (LP# 7204949)

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