RAIL REPORTS - 2006 - R06T0022

Table of Contents

1.0 Factual Information

• 1.1 The Accident
• 1.2 Site Examination
• 1.3 Track Information
• 1.4 Freight Car CP 346875
• 1.5 Freight Car and Wayside Inspection
• 1.6 Derailments Involving Canadian National's Transcona Wheel Shop
• 1.7 Association of American Railroads Wheel Shop Practice and Wheel Set Assembly
• 1.8 Wheel Set Recording Marks, Service Life, and Record Keeping
• 1.9 Canadian National-Led Research to Determine the Cause of Transcona Wheel Shop Loose Wheels
• 1.10 Industry Response to Transcona Wheel Shop Loose Wheel Issue
• 1.11 Canadian National Internal Response to Transcona Wheel Shop Loose Wheel Issue
• 1.12 TSB Engineering Laboratory Report
• 1.13 Canadian Pacific Railway Accelerated Wheel Removal Program on Coil Steel Cars
• 1.14 Transport Canada Regulatory Overview

2.0 Analysis

• 2.1 Introduction
• 2.2 The Accident
• 2.3 Transcona Wheel Shop Loose Wheel Derailments
• 2.4 Association of American Railroads Wheel Boring and Mounting Standards
• 2.5 Industry Response and Recall Protocols for Transcona Wheel Shop Loose Wheels
• 2.6 Tracking Wheel Set Components
• 2.7 Canadian Pacific Railway Overview in Accelerated Wheel Removal Program

3.0 Conclusions

• 3.1 Findings as to Causes and Contributing Factors
• 3.2 Findings as to Risk

4.0 Safety Action

• 4.1 Action Taken
• 4.1.1 TSB Rail Safety Advisories
• 4.1.2 Industry Response
• 4.2 Action Required
• 4.2.1 Removal of Suspect Transcona Wheel Shop Wheel Sets
• 4.2.2 Tracking Wheel Set Components
• 4.3 Safety Concern
• 4.3.1 Wheel Manufacturing Defects

Appendices

• Appendix A - Canadian National Transcona Wheel Shop Loose Wheel Derailments in Canada (2000-2006)
• Appendix B - Canadian National Transcona Wheel Shop Out-of-Gauge/Loose Wheel Findings (2000-2006)
• Appendix C - Glossary

Photos

• Photo 1 - No. 1 Wheel Set from Car CP 346875
• Photo 2 - Wheel Mount Press
• Photo 3 - Wheel Movement on Axle Seat (2 inches), Typical of Loose Wheel-Related Occurrences
• Photo 4 - Typical Cross-Section of Wheel Bores Examined
• Photo 5 - Typical Axle Wheel Seat Examined

Figures

• Figure 1 - Derailment Location
• Figure 2 - Derailment Site
• Figure 3 - Cumulative Main-Track Derailments in Canada Involving Loose 36-inch Canadian National Transcona Wheel Shop Wheel Sets, by Date
• Figure 4 - Forces Acting on a Wheel During Curving

Previous | Next