1.   It was several preceptors phasing out together, Posi later explained, that threw directional control and some other functions out of kilter.

2.   But in that crash, a piece of directional control equipment was found to have been improperly installed during a maintenance session.

3.   It comes with PrecisionTrac, a suspension system that provides excellent directional control even during strong crosswinds.

4.   His cockpit heater and directional controls began failing Saturday, chief engineer Tim Cole said.