# SDR IPXA2026041322009

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 9, 2026
- Submitted: April 14, 2026
- Operation: Air carrier
- Aircraft: [N572UP](https://openairdocs.org/aircraft/N572UP), registered now
- Make and model: Boeing 747-44AF
- Registry model: [Boeing 747-44AF](https://openairdocs.org/model/boeing-747-44af) (OpenAirDocs)
- Aircraft serial: 35669
- Aircraft time: 64,515 hours, 10,226 cycles
- System (JASC): [5610 · Flight Compartment Windows](https://openairdocs.org/jasc/5610)
- Part: Window
- Condition: Cracked
- Location: Zone 200
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2026041322009

## Discrepancy

AT FL 370 FWD WINDOW LEFT CRACKED.  R & R L1 WINDOW IAW AMM 56-11-01/401.  REPLACED WINDOW HEAT CONTROL UNIT IAW AMM 30-41-01/401. OPS CHKD WINDSHIED HEATER SYS AND WIPER IAW AMM 30-41-00/501 & 30-42-00/501, CHKD NORMAL, AIRCRAFT OK FOR SERVICE.

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