# SDR CALA2026090319217

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 31, 2026
- Submitted: September 3, 2026
- Operation: Air carrier
- Aircraft: [N17338](https://openairdocs.org/aircraft/N17338), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 67599
- Aircraft time: 9,563 hours, 3,210 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Control Unit
- Part number: 8300027904
- Part serial: 7231
- Condition: Faulted
- Location: Rt Windshield
- Part time: 10,936 hours, 3,714 cycles
- Stage of operation: CR
- 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/CALA2026090319217

## Discrepancy

WINDOW HEAT OVERHEAT LIGHT COMES ON   FOLLOWED QRH WITH NEGATIVE RESULTS. SWITCH IS IN OFF POSITION PER QRH GUIDANCE.  CAPTAIN STATED IT WAS THE RT FWD WINDOW.   TROUBLESHOOTING CARRIED OUT ON R1 WINDOW OVERHEAT LIGHT, OPS TEST AND BITE TEST CARRIED OUT IAW AMM 30-41-11-710-801, FOUND WHCU, LRU RED LIGHT ON WHCU. SWAPPED POS LT & RT WHCU FOUND FAULT FOLLOWED OVER. DEFER IAW MEL 3041B.   REMOVED AND REPLACED WHCU RT IAW AMM 30-41-11. OPS CHKD GOOD.  MEL CLEARED.

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