A vibrator is mounted in the elevator control linkage, to reduce friction in the linkage and to provide an accurate return to neutral of the controls. This is particularly important for the auto-pilot operation. If the neutral position is not well defined, the autopilot will oscillate around neutral position.

A vibrator is mounted in the aileron control linkage, to reduce friction in the linkage and to provide an accurate return to neutral of the controls. This is particularly important for the auto-pilot operation. If the neutral position is not well defined, the autopilot will oscillate around neutral position.

Turns on ceiling lights in the cargo hold. These lights can also be energized from the cargo compartment entrance.

This warning lamp illuminates when one of the cargo compartment lights is on.

Turns on the evacuation alarm. When this push button switch is pressed again, the alarm is silenced.

Cockpit dome light (red). Turns on the two ceiling lights located left and right of the cockpit door.

Turns on the red or white glareshield lights. White is usually used on ground and flying near thunderstorm clouds at night to avoid blinding the pilot.