# SDR USAASB01100

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 11, 2001
- Submitted: May 15, 2001
- Operation: Air carrier
- Aircraft: [N433US](https://openairdocs.org/aircraft/N433US), registered now
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24555
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Controller
- Part number: 2312
- Condition: Failed
- Location: E/E Compt
- Part time: 23,139 hours
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAASB01100

## Discrepancy

IAH - FLT 1934 - ON CLIMB-OUT FROM IAH, PASSING THROUGH FL180 EN ROUTE TO PHL, FLIGHT ATTENDANT ADVISED CREW OF A BURNING ODOR IN THE CABIN.  FLIGHT RETURNED TO FIELD AT IAH AND LANDED WITHOUT FURTHER INCIDENT.  AN EMERGENCY WAS DECLARED.  MAINTENANCE FOUND THE FORWARD RIGHT WINDOW HEAT CONTROLLER NOT FUNCTIONING.  A TRANSFORMER SMELL WAS BEING EMITTED FROM THE NR 4 CONTROL BOX.  REMOVED AND REPLACED THE NR 4 FORWARD RIGHT WINDOW HEAT CONTROLLER.  OPS CHECK GOOD.  CLEARED ODOR/SMOKE FROM CABIN.  AIRCRAFT OK FOR SERVICE.  (M)

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