# SDR 0001746304

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 2, 2000
- Submitted: May 15, 2000
- Operation: Air carrier
- Aircraft: N644US
- Make and model: Boeing 747451
- Aircraft serial: 23819
- Aircraft time: 45,689 hours, 5,710 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/0001746304

## Discrepancy

DURING ''M'' CHECK, FOUND CORROSION ON UPPER DECK FLOORBEAM, UPPER CHORD AT BS 1020, RBL 13 TO LBL 13.  REPAIRED PER EA 63-175810.

---
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.