# SDR ASAA2022122841290

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 28, 2022
- Submitted: December 29, 2022
- 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: 115 hours, 41 cycles
- System (JASC): [3097 · Ice/Rain Protection System Wiring](https://openairdocs.org/jasc/3097)
- Part: Circuit Breaker
- Condition: Tripped
- Location: Window Overheat
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022122841290

## Discrepancy

L SIDE WINDOW HEAT "OVERHEAT" ILLUMINATED. GROUNDED - YES. PER B737-9 IFIM 30-41-00-810-827 WHCU LEFT SIDE HAD NO POWER. CIRCUIT BREAKER WAS OUT. RESET CIRCUIT BREAKER. PERFORMED WHCU BITE. NO FAULTS. PERFORMED WINDOW HEAT TEST. TEST GOOD.

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