# SDR IPXA2025100973364

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 9, 2025
- Submitted: October 9, 2025
- Operation: Air carrier
- Aircraft: [N579UP](https://openairdocs.org/aircraft/N579UP), registered now
- Make and model: Boeing 747-45E
- Registry model: [Boeing 747-45E](https://openairdocs.org/model/boeing-747-45e) (OpenAirDocs)
- Aircraft serial: 26062
- Aircraft time: 122,136 hours, 20,615 cycles
- System (JASC): [7510 · Engine Anti-Icing System](https://openairdocs.org/jasc/7510)
- Part: Anti-Ice System
- Condition: Warning Message
- Location: Nr 2 Engine
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2025100973364

## Discrepancy

**ATB**ANTI-ICE NAC 1, ANTI-ICE NAC 2, ANTI-ICE NAC 3, ANTI-ICE NAC 4 STATUS MESSAGE PERFORMED OPS TEST IAW AMM:31-21-00/501 REV.114<BR>FOUND SATIS.<BR>ALL TOOLS AND PARTS REMOVED FROM AIRCRAFT<BR>CRN97059690 /  SCHROEDER  /  Q9DY421Y

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