A de Havilland DHC-6 Twin Otter airplane, N30EA, collided with another Twin Otter airplane, N70EA,
on the runway. The pilot of N30EA reported that, once she started the engines, the airplane rolled
forward and to the left 180 degrees because the steering-tiller had been positioned sharply to the left
when the airplane was last parked. The pilot stated that, when she applied the brakes, there was no
response, and the airplane subsequently collided with the right wing of N70EA. The pilot of N30EA
reported that, after the collision, she noted that the hydraulic circuit breaker was open; this would have
resulted in insufficient hydraulic pressure to control the parking or pedal brakes. The pilot of N30EA
said that she should have noticed that the hydraulic circuit breaker was open before she started the
engines because it was part of the Before Starting Engines checklist.
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