# SDR UPS07450301

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 5, 2007
- Submitted: July 27, 2007
- Operation: Air carrier
- Aircraft: N522UP
- Make and model: Boeing 747 212B
- Registry model: [Boeing 747 212B](https://openairdocs.org/model/boeing-747-212b) (OpenAirDocs)
- Aircraft serial: 21936
- Aircraft time: 74,820 hours, 17,560 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Condition: Corroded
- Location: Bs 2340
- 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/UPS07450301

## Discrepancy

INSPECTION TYPE:C M/D BS2340 LBL40-59 FLOORBEAM UPPER CHORD FOUND SEVERAL AREAS OF CORROSION.  CORROSION BLEND OUT 0.040" BY 1" BY 3" EXCEED SRM LIMIT.  M/D BS 2340 LBL 25 TO LT MOST O/B FLOORBEAM UPPER CHORD REPAIRED AS PER SRM 51-40-04 FIG 1.

---
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.