# SDR UIEA200600102

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 3, 2006
- Submitted: May 25, 2006
- Operation: Air carrier
- Aircraft: [N522MC](https://openairdocs.org/aircraft/N522MC), registered now
- Make and model: Boeing 747-2D7B
- Registry model: [Boeing 747-2D7B](https://openairdocs.org/model/boeing-747-2d7b) (OpenAirDocs)
- Aircraft serial: 21783
- Aircraft time: 94,219 hours, 18,764 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Condition: Cracked
- Location: Zone 200
- 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/UIEA200600102

## Discrepancy

BS 340 FLOORBEAM UPPER CHORD AFT FLANGE 1 HOLE AT RBL 41 FOUND CRACK RUNNING AFT.  FLOORBEAM UPPER CHORD AFT FLANGE AT RBL 41" AREA HOLE OVERSIZED BY INCREMENT TO FINAL HOLE SIZE .309" GAGE DISTANCE IS 0.500".  E/D= 1.618" WITHIN SB 53A2431 PART 3, TABLE 1 REQUIREMENT.  NO REPAIR IS REQUIRED, CONTINUE INSPECTION IS REQUIRED AS PER SB 53A2431 PART 3.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.