# SDR ASAA2019072330188

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 23, 2019
- Submitted: July 25, 2019
- Operation: Air carrier
- Aircraft: [N566AS](https://openairdocs.org/aircraft/N566AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35182
- Aircraft time: 47,897 hours, 14,311 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Module
- Part number: 233A3201302
- Part serial: F05299
- Condition: Failed
- Location: Window Heat
- Part time: 14,235 hours, 6,518 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019072330188

## Discrepancy

FO RIGHT SIDE OVERHEAT LIGHT ILLUMINATED AFTER ENGINE START. COMPLETED QRH CHECKLIST AND LIGHT ILLUMINATED AGAIN. GROUNDED - YES. PERFORMED RIGHT SIDE WHCU BITE REF FIM 30-41 TASK 801. FOUND FAULT FOR P5-9 CTRL POWER. RIGHT SIDE WHCU REMOVED AND REPLACED REF AMM 30-41-11. NO HELP. REINSTALLED ORIGINAL WHCU FOR RIGHT SIDE WINDOW. REMOVED AND REPLACED WINDOW PITOT HEAT MODULE REF AMM 30-41-41. PERFORMED WHCU TEST FOR RIGHT SIDE WINDOW REF AMM 30-41-11. PERFORMED WINDOW HEAT SYSTEM OPERATIONAL TEST REF AMM 30-41-00-710-801. T/S PER FIM 30-41 TASK 813. ALL TEST PASS. OPS CKS GOOD. NO FAULTS. ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SUCCESSFUL.

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