# SDR ASAA2023103145956

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 31, 2023
- Submitted: November 3, 2023
- Operation: Air carrier
- Aircraft: [N954AK](https://openairdocs.org/aircraft/N954AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44104
- Aircraft time: 3,615 hours, 1,038 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Control Unit
- Part number: 8300027904
- Part serial: 05641
- Condition: Faulted
- Location: E/E Shelf E4-2
- Part time: 3,649 hours, 1,047 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023103145956

## Discrepancy

R2 WINDOW HEAT INOP. GROUNDED - YES. ACCOMPLISHED WHCU BITE AND HAD WHCU-LRU RED FAULT LIGHT ILLUMINATED FOR LF AND RS REF AMM 30-41-11. DUE TO HISTORY REMOVED AND REPLACED WHCU REF AMM 30-41-11. OPERATIONAL TEST PASS.

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