# SDR NWAA071686744

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 2, 2007
- Submitted: May 2, 2007
- Operation: Air carrier
- Aircraft: N644NW
- Make and model: Boeing 747212F
- Aircraft serial: 24177
- Aircraft time: 69,320 hours, 12,718 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Condition: Corroded
- Location: Bs 440
- 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/NWAA071686744

## Discrepancy

DURING "M" CHECK, FOUND CORROSION ON UPPER DECK FLOORBEAM UPPER CHORD BS 440 LBL 76.  REPAIRED PER EA 67-209236.

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