# SDR ASAA2021010433821

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 4, 2021
- Submitted: January 7, 2021
- Operation: Air carrier
- Aircraft: [N431AS](https://openairdocs.org/aircraft/N431AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43255
- Aircraft time: 27,290 hours, 8,804 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Sensor
- Condition: Faulted
- Location: R2 Window Heat
- Component: Window
- Component part number: 56100028
- Stage of operation: CL
- 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/ASAA2021010433821

## Discrepancy

R2 WINDOW OVERHEAT LIGHT ILLUMINATED DURING CLIMB.  FOLLOWED QRH PROCEDURE.  LIGHT EXTINGUISHED FOR APPROXIMATELY 5 MINUTES THEN ILLUMINATED AGAIN.  TURNED SWITCH OFF FOR REMAINDER OF FLIGHT.  GROUNDED-YES.  ACCOMPLISHED RT SIDE WINDOW HEAT CONTROL BITE.  SENSOR FAULT ALL 10 PREVIOUS FLIGHT LEGS AND SENSOR ALREADY MOVED TO SECONDARY.  REPLACED RT NR 2 WINDOW, REF B737-900 AMM 56-12-11.  ACCOMPLISHED NR 2 WINDOW ADJUSTMENT, REF AMM 56-12-11-820-801.  ALL MEASUREMENTS WITHIN LIMITS.  ACCOMPLISHED NR 2 WINDOW HEAT OPERATIONAL TEST, TEST NORMAL.  ACCOMPLISHED CABIN PRESSURE LEAK TEST, REF AMM 05-51-91-790-801.  NO LEAKS NOTED.

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