# SDR ASAA2020011431848

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 13, 2020
- Submitted: January 15, 2020
- Operation: Air carrier
- Aircraft: [N434AS](https://openairdocs.org/aircraft/N434AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 61620
- Aircraft time: 15,209 hours, 4,816 cycles
- System (JASC): [3020 · Air Intake Anti/De-Ice System](https://openairdocs.org/jasc/3020)
- Part: Anti-Ice Valve
- Part number: 32156185
- Part serial: 12907
- Condition: Stuck
- Location: Nr 1 Engine
- Part time: 15,199 hours, 4,814 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020011431848

## Discrepancy

LEFT "COWL VALVE OPEN" REMAINED ILLUMINATED AFTER SWITCH MOVED TO OFF POSITION. GROUNDED - YES. REMOVED AND REPLACED NR 1 ENGINE ANTI-ICE VALVE REF AMM 30-21-11. PERFORMED SATISFACTORY OPS/ LEAK CK OF NR 1 ANTI-ICE VALVE USING THE ENGINE BLEED METHOD REF AMM 71-00-00. LEFT ANTI-ICE VALVE OK FOR SERVICE.

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