# SDR IPXA2018041228478

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 14, 2018
- Submitted: April 13, 2018
- Operation: Air carrier
- Aircraft: [N581UP](https://openairdocs.org/aircraft/N581UP), registered now
- Make and model: Boeing 747-4R7F
- Registry model: [Boeing 747-4R7F](https://openairdocs.org/model/boeing-747-4r7f) (OpenAirDocs)
- Aircraft serial: 25866
- Aircraft time: 108,153 hours, 18,127 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Part number: 457U104226
- Condition: Corroded
- Location: Main Deck
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2018041228478

## Discrepancy

INSPECTION TYPE: D2, CORROSION ON THE MAIN DECK FLOORBEAM AT BS 520, LBL 63.  REPLACED IAW SRM 51-40-02-0G, REV 82, DWG 457U1066, SH 2, REV D, DWG 457U1066, SH 6, REV C, AND DWG 457U2700, SH 1, REV D.

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