(8) HOLD button - Depress to restore the display to
Automatic Leg Switching - Check as follows:
ROLL LIM key - 25° (dim) for the first waypoint.
ROLL LIM key - 10° (lighted) for second waypoint.
Check that the aircraft changes course smoothly.
Attitude Mode - Check as follows.
Mode selector - ATT after passing
the starting point and
the present position.
Check that INS attitude signals
continue to be available by
Check that the instruments can
operate from other navigation
signals not coming from the INS.
Audio control panel and inter
phone system - Check each unit as follows:
Interphone functional check:
Receiver selector switches - OFF.