# SDR EIA2004137

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 20, 2004
- Submitted: November 16, 2004
- Operation: Air carrier
- Aircraft: N470EV
- Make and model: Boeing 747273C
- Aircraft serial: 20653
- Aircraft time: 89,121 hours, 19,948 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/EIA2004137

## Discrepancy

BS 540, UPPER DECK FLOORBEAM, UPPER FORWARD SIDE OF CHORD LBL3 THRU LBL6 HAS EXFOLIATING CORROSION.  REMOVED, FABRICATED, AND INSTALLED REPLACEMENT CHORD PER B747 SRM 53-30-03, FIGURE 1, ALONG WITH MM 51-30-05 AND 51-20-02.

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