Equipment Bulletins

Safety Alert Type: 
Heavy Equipment
Moffat Lakes Road (James Mountain area)
Date of Incident / Close Call: 
Company Name: 
Westline Harvesting
Details of Incident / Close Call: 

On January 28, 2008 one of our loaded Super-B-Train logging trucks encountered braking problems at 1.5 km on the Moffat Lakes Road (James Mountain area) and resulted in the truck and trailers upsetting. Upon brake applications, the pup trailer kept pushing the lead trailer sideways, and not allowing the driver to slow the vehicle in a controllable manner. The driver realized he was a approaching a steeper road section with a sharp corner, and made a heavy brake application to get the vehicle stopped prior to the hill and corner. Upon the heavy brake application, the pup shoved the lead trailer into the snow bank / ditch line, which caused the trailers to upset in the ditch and in turn caused the truck to upset on the road. The investigation identified that the air service line valve to the pup trailer had not been opened by the driver, which caused the pup trailer to have no braking power, and reduced the over-all braking power of the vehicle by 25% The truck and trailers sustained substantial damage due to twisted frames. There were no injuries in this incident. However, the incident had the potential causing a serious injury and/or a fatality.


  • The driver failed to follow procedure and open the service line air valve on the brake system to the pup trailer.
  • The driver failed to properly monitor / check his braking system and valves prior to departure.


Learnings and Suggestions: 

Ensure that all air lines and valves are open, and that brakes are functioning properly prior to departure.

For more information on this submitted alert: 

David Whitwell at 250-392-4822

File attachments
2008-01-28 Braking Problem.pdf
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