Auto Accident Regional Resources

Pennsylvania Runway Truck Accident Reveals Dangers

WASHINGTON, D.C. - The National Transportation Safety Board adopted a final report today of a runaway truck accident in Pennsylvania that has shown the consequences of improper maintenance on automatic slack adjusters for air brake systems. The Board issued 11 safety recommendations aimed at improving training for drivers and mechanics who work with air brakes.

On April 11, 2003, in the Borough of Glen Rock, Pennsylvania, a dump truck was traveling southbound on a steep downgrade of Church Street, when the driver found that he was unable to stop the truck. The truck struck four passenger cars, one of which struck three children who were on the sidewalk. As a result of the collision, a driver and an 11-year-old child from one of the passenger cars were killed. The remaining vehicle occupants and the three pedestrians received serious to no injuries.

The NTSB determined that the probable cause of the accident was the lack of oversight by the truck's owner, Blossom Valley Farms, Inc., which resulted in an untrained driver improperly operating an overloaded, air brake-equipped vehicle with inadequately maintained brakes. Contributing to the accident was the misdiagnosis of the truck's underlying brake problems by mechanics involved with the truck's maintenance. Also contributing was a lack of readily available and accurate information about automatic slack adjusters and inadequate warnings about safety problems caused by manually adjusting them.

NTSB Acting Chairman Mark V. Rosenker said, "We believe that more than 500,000 vehicles equipped with air brakes may be operated by drivers who, like the Glen Rock driver, have no air brake training and therefore may not be able to operate their vehicles safely. This situation needs to change, and change quickly."

The 21-year-old driver had been working for Blossom Valley for less than two weeks and had never driven an air brake-equipped vehicle before joining the company. Also, he received no training on how to drive an air brake-equipped vehicle. This is important because air brakes on trucks operate differently from hydraulic brakes on passenger cars. In addition, the rear brakes on the accident truck were out of adjustment.

Post-accident toxicological testing indicated that the driver had likely used cocaine and heroin in the two days preceding the accident but the Board could not determine if he was impaired at the time of the crash. In any case, the Board said, even if unimpaired by drugs or fatigue, he likely could not have stopped the truck before the accident occurred because of the driver's lack of specific training and the condition of the brakes.

The Board found that mechanics who worked on this truck and the driver who worked on a truck involved in a similar accident that occurred in California in 2003 did not look for underlying problems with the slack adjusters or other brake components; consequently, they misdiagnosed the brake problems, probably because they were not properly educated on the function and care of automatic slack adjusters and how they relate to foundation brake systems. "The warnings in existing materials available to owners, drivers, mechanics, and inspectors of air-braked vehicles equipped with automatic slack adjusters have not been successful in communicating the inherent dangers of manually adjusting automatic slack adjusters to correct out- of-adjustment brakes," the Board said.

The 11 safety recommendations all address training or regulations concerning air brake-equipped vehicles, and were sent to the Federal Motor Carrier Safety Administration, the State governments, the Commercial Vehicle Safety Alliance, automatic slack adjuster manufacturers, manufacturers of vehicles equipped with air brakes, the National Institute for Automotive Service Excellence and several publishers of study guides.

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