# SDR ASAA2023022442056

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 24, 2023
- Submitted: February 27, 2023
- Operation: Air carrier
- Aircraft: [N921AK](https://openairdocs.org/aircraft/N921AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 43337
- Aircraft time: 5,155 hours, 1,485 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: M
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023022442056

## Discrepancy

L FWD WINDOW HEAT LIGHT ILLUMINATED, EXTINGUISHED AFTER QRH PROC. GROUNDED - YES. AFTER A/C RETURN TO GATE, OBSERVED OVERHEAT LIGHT ON FOR LEFT FORWARD. ACCOMPLISHED B737-9 IFIM 30-41-00-810-828. RESISTANCE CK FOR PRIMARY SENSOR SHOWS OPEN, SPARE SENSOR CKED NML & HEAT FILM CKED GOOD REF B737-9 WDM 30-41-11. DUE TO OPERATIONAL NEEDS WHCU OVERRIDE MODE ACTIVATED TO SPARE SENSOR REF B737-9 AMM 30-41-11-440-801 LEFT FWD WINDOW HEAT OPS NML.

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