# SDR FDEA202507171249

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 17, 2025
- Submitted: July 18, 2025
- Operation: Air carrier
- Aircraft: [N948FD](https://openairdocs.org/aircraft/N948FD), registered now
- Make and model: Boeing 757236
- Aircraft serial: 25059
- Aircraft time: 45,063 hours, 37,209 cycles
- System (JASC): [5610 · Flight Compartment Windows](https://openairdocs.org/jasc/5610)
- Part: Window
- Part number: 141W740047
- Part serial: 18215H4601
- Condition: Cracked
- Location: Zone 200 L1
- Part time: 3,970 hours, 2,668 cycles
- Stage of operation: CR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA202507171249

## Discrepancy

L1 WINDOW CRACK DURING CRUISE AT FL400. WINDOW  STARTED ARCING AND CRACKING, RAN WINDOW DAMAGE QRH.  DESELECTED L FWD WINDOW HEAT, ARCING AND CRACKING  STOPPED.

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