# SDR ASAA2023031042302

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 10, 2023
- Submitted: March 13, 2023
- Operation: Air carrier
- Aircraft: [N409AS](https://openairdocs.org/aircraft/N409AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41733
- Aircraft time: 36,389 hours, 11,608 cycles
- System (JASC): [3010 · Airfoil Anti/De-ice System](https://openairdocs.org/jasc/3010)
- Part: Solenoid
- Part number: 3205482
- Part serial: 23937
- Condition: Faulty
- Location: #2 Engine
- Part time: 21,625 hours, 7,008 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023031042302

## Discrepancy

GWTAI VALVE SOLENOID TEST FAILED DURING MW0311 HARNESS INSTALLATION TEST FOR #2 ENGINE. REF. AMM 30-11-12-710-801 AND TSR713934. GROUNDED - YES. REPLACED THE GWTAI SOLENOID REF B737-900 AMM 30-11-12. NO HELP. REPLACED THE PRECOOLER VALVE PER AMM 36-12-02. OPS CK GOOD. ETOPS GROUND VERIFICATION SUCCESSFUL. GWTAI SOLENOID VALVE PASSED REF AMM 30-11-12.

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