# SDR ASAA2019031428635

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 14, 2019
- Submitted: March 19, 2019
- Operation: Air carrier
- Aircraft: [N566AS](https://openairdocs.org/aircraft/N566AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35182
- Aircraft time: 46,591 hours, 13,938 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Module
- Part number: 233A3201302
- Part serial: D02316
- Condition: Failed
- Location: Window Heat
- Part time: 46,440 hours, 14,042 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019031428635

## Discrepancy

WHILE ACCOMPLISHING WINDOW HEAT TEST R1 WINDOW WOULD NOT GO INTO OVERHEAT CONDITION WHEN TEST SWITCH IS SELECTED TO THE OVERHEAT POSITION. GROUNDED - YES. WHCU BITE FAULTS R1 P5-9 PWR CONT. REPLACED P5-9 WINDOW HEAT CONTROL MODULE AMM 30-41-41. ALT DEACTIVATION USED CH5, TABLE 3, ITEM 1. INSTL. TEST GOOD. PITOT PROBE, AOA SENSOR AND TAT PROBE HEATER SYSTEM TEST PASS AMM 30-31-00-730-801.

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