# SDR ASAA2022061538671

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 15, 2022
- Submitted: June 17, 2022
- Operation: Air carrier
- Aircraft: [N933AK](https://openairdocs.org/aircraft/N933AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44098
- Aircraft time: 800 hours, 239 cycles
- System (JASC): [3010 · Airfoil Anti/De-ice System](https://openairdocs.org/jasc/3010)
- Part: Anti-Ice Valve
- Part number: 632160683
- Part serial: 6321606810371
- Condition: Stuck
- Location: Right Wing
- Part time: 798 hours, 238 cycles
- Stage of operation: DE
- 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/ASAA2022061538671

## Discrepancy

WING ANTI-ICE R VALVE CAUTION LIGHT ILLUMINATED DURING DESCENT WHEN WING ANTI-ICE WAS SELECTED ON. EXTINGUISHED WHEN WING ANTI-ICE WAS TURNED OFF. GROUNDED - YES. PILOT VERBAL- OPERATED NORM AFTER CYCLING BACK TO ON. THEN CYCLED ANTI-ICE SWITCH OFF & BACK ON A SECOND TIME & THE VALVE STUCK IN TRANSITION AGAIN. SUSPECT BAD "R WING ANTI-ICE VALVE". REMOVED & REPLACED RH WING ANTI-ICE VALVE. OPS CHECKED GOOD, LEAK CHECKED GOOD, 2X C/B RESET, A/C RETURNED TO NORMAL. REF B737-9 AMM 30-11-11.

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