# SDR AWXA200400462

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 2, 2004
- Submitted: May 3, 2004
- Operation: Air carrier
- Aircraft: [N156AW](https://openairdocs.org/aircraft/N156AW), registered now
- Make and model: Boeing 737-3G7
- Registry model: [Boeing 737-3G7](https://openairdocs.org/model/boeing-737-3g7) (OpenAirDocs)
- Aircraft serial: 23778
- Aircraft time: 53,421 hours, 37,888 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Control Unit
- Part number: 2312
- Part serial: 7103
- Condition: Defective
- Location: Cockpit
- Part time: 49,693 hours, 37,509 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AWXA200400462

## Discrepancy

AFTER TAKEOFF, LT FORWARD WINDOW OVERHEAT LIGHT ILLUMINATED, FOLLOWED QRH BUT LIGHT REMAINED ON, TURNED BACK DUE TO KNOWN ICING CONDITIONS AT MCI.  MAINT FOUND A LOOSE WIRE IN TERMINAL LUG AT CIRCUIT BREAKER, RE-TERMINATED WIRE.  R & R LT FWD WINDOW ANTI-ICE CIRCUIT BREAKER AND LT FORWARD WINDOW HEAT CONTROL UNIT IAW BMM, OPS CHK OF WINDOW ANTI-ICING SYSTEM GOOD. FUNCTIONAL TEST OF WINDOW HEAT CONTROL UNIT S/N 7103 CONFIRMED FAILURE OF UNIT FOR OUTPUT TEST. TEARDOWN OF UNIT FOUND TRANSFORMER T1 ARCING, REPLACED TRANSFORMER AND DEFECTIVE PARTS IAW CMM 30-40-02, REV. 14.

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