# SDR UPS06448599

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 20, 2006
- Submitted: November 13, 2006
- Operation: Air carrier
- Aircraft: N677UP
- Make and model: Boeing 747123F
- Aircraft serial: 20391
- Aircraft time: 97,105 hours, 24,042 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Condition: Corroded
- Location: Fuselage
- 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/UPS06448599

## Discrepancy

BS 520 LBL 26-28 FLOORBEAM UPPER CHORD FOUND CORRODED.  CORROSION BLEND OUT 0.054" BY 1" BY 2" EXCEED SRM 53-10-01 FIG 1 LIMITS.  FLOORBEAM UPPER CHORD REPAIRED AS PER SRM 51-40-04 FIG 3 REFER NRC NR 50665 FOR WORKING DETAIL.

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