# SDR IPXA2026010883023

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 7, 2026
- Submitted: January 8, 2026
- Operation: Air carrier
- Aircraft: [N469UP](https://openairdocs.org/aircraft/N469UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25485
- Aircraft time: 36,104 hours, 21,792 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Control Unit
- Part number: 141N48901
- Part serial: 22136H4879
- Condition: Faulted
- Location: Window Heat
- Stage of operation: CR
- 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/IPXA2026010883023

## Discrepancy

AT CRUISE FLT AT FL380. L SIDE WINDOW HAD STARTED TO DELAMINATE THE HEATING ELEMENT. FOLLOWED QRH CHECKLIST & WINDOW WAS EXTREMELY HOT TO TOUCH AND APPROX 5IN AREA IS AFFECTED. REMOVED AND INSTALLED L2 WINDOW IAW AMM 56-11-02/401 UP TO AND INCLUDING STEP C.8. UNABLE TO GET WINDOW TO LOCK, FURTHER ADJUSTMENT REQUIRED REF AMM 56-11-02/501.  R & R M192 WINDOW HEAT CONTROL UNIT. REF AMM 30-41-01. PERFORMED BITE TEST, CHECK GOOD. VERIFIED PROPER INSTALLATION OF ELECTRICAL CONNECTORS. VERIFIED TORQUE OF ELECTRICAL CONNECTORS, AS REQUIRED. REF AMM 56-11-02.

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