# SDR IPXA2026071772387

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 21, 2026
- Submitted: July 17, 2026
- Operation: Air carrier
- Aircraft: [N583UP](https://openairdocs.org/aircraft/N583UP), registered now
- Make and model: Boeing 747-4R7F
- Registry model: [Boeing 747-4R7F](https://openairdocs.org/model/boeing-747-4r7f) (OpenAirDocs)
- Aircraft serial: 25867
- Aircraft time: 138,855 hours, 23,452 cycles
- System (JASC): [5400 · Nacelle/Pylon Structure](https://openairdocs.org/jasc/5400)
- Part: Duct
- Part number: 2242302545
- Part serial: 6149001
- Condition: Cracked
- Location: Zone 400
- 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/IPXA2026071772387

## Discrepancy

CRACKED DUCT , NR  1 ENG RT CORE COWL PRECOOLER EXHAUST DUCT.  IAW AMM 71-11-06-004-001-J00, REV 117, AND AMM 71-11-06-404-006-J00, REV 117,  REPLACED THE CORE COWL . COMPLETED THIS JOB AND CONDITION CHECK SATISFACTORY.

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