Fairchild Industries Inc SA227-AC, VH-CUZ

The pilot reported that shortly after commencing the take-off
roll the Metroliner began tracking to the right of the runway
centreline. The crew discontinued the takeoff, taxiied back to the
end of the runway and subsequently completed a normal takeoff. In
both instances, the nosewheel steering had not been engaged.

The operations department of the company believed that the
aircraft had been modified in accordance with a service bulletin
that prohibited the use of nose-wheel steering for take-off and
landing. A check of documentation following the incident revealed
that the modification had not been installed in the aircraft. The
correct procedure in this case was for the nosewheel steering to be
engaged for takeoff.