# SDR ASAA2019022758371

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2019
- Submitted: February 28, 2019
- Operation: Air carrier
- Aircraft: [N483AS](https://openairdocs.org/aircraft/N483AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36350
- Aircraft time: 14,142 hours, 4,659 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Warning Message
- Condition: False Activation
- Location: Lt Window Heat
- Stage of operation: AP
- 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/ASAA2019022758371

## Discrepancy

LEFT SIDE WINDOW "OVERHEAT" ILLUMINATED ON APPROACH. RESET VIA QRH AND WINDOW OVERHEAT ILLUMINATED AGAIN. GROUNDED - YES. PERFORMED MULTIPLE GOOD OPS TESTS OF WINDOW HEAT ON L/H SIDE WINDOW PER B737-900 AMM 30-41-00-710-801. PERFORMED GOOD RESISTANCE CHECK OF BOTH SENSORS ON L/H SIDE WINDOW PER AMM 30-41-21-760-801. PERFORMED GOOD OPS TEST OF WINDOW HEAT CONTROL UNIT PER AMM 30-41-11-710-801. NO HISTORY PAST 30 DAYS. COULD NOT DUPLICATE PROBLEM.

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