Piper Arrow IV, Maintenance Manual

Page: 417 / 752

LANDING GEAR WARNING SWITCHES. (Throttle Switches)
LANDING GEAR UP/POWER REDUCED WARNING SWITCH.
The gear up/power reduced warning switch is within the control quadrant below the throttle control lever.
(Refer to Figure 32-24.) This switch will actuate the warning horn and red light simultaneously when the
landing gear is not down and locked, and the throttle is reduced to the below 14 inches of manifold pressure.
REMOVAL OF LANDING GEAR UP/POWER REDUCED WARNING SWITCH.
1. Loosen the quadrant cover by removing the cover attaching screws from each side and at the bottom of
the cover.
2. Pull the cover aft enough to remove the screws that secure the reinforcing clip to the top underside of
the cover. Remove the cover.
3. Remove the switch from its mounting bracket by removing the switch attaching screws.
4. Disconnect the electrical leads from the switch.
INSTALLATION OF LANDING GEAR UP/POWER REDUCED WARNING SWITCH.
1. Connect the electrical leads to the switch.
2. Position the switch with actuator follower against its mounting bracket and secure with screws.
3. The switch may be adjusted at this time per instructions in Adjustment of Landing Gear Up/Power
Reduced Warning Switch.
4. With the control levers aft, slide the quadrant cover into position around the controls far enough to
allow the cover reinforcement clip to be installed to the top underside of the cover and secure with screws.
5. Install the cover and secure with screws.
ADJUSTMENT OF LANDING GEAR UP/POWER REDUCED WARNING SWITCH.
1. Remove the control quadrant cover as given in Removal of Landing Gear Up/Power Reduced Warning
Switch.
2. Flight test the airplane and at a safe altitude, establish a normal descent with gear up and the propeller
control at a desired low pitch setting.
3. Retard the throttle to a manifold pressure of approximately 14 inches. This setting should be an
airspeed above 110 KIAS.
4. In some manner, mark the throttle lever in relation to its position next to the mounting bracket.
5. With the airplane on the ground and the throttle positioned to the mark, loosen the screws that secure
the switch and rotate it toward the throttle until it is heard to actuate. Retighten the switch attachment screws.
6. Advance and retard the throttle to ascertain that the switch actuates at the desired throttle lever setting.
The airplane may also be flown to ascertain that the horn and light will actuate when the throttle is reduced
below approximately 14 inches of manifold pressure with gear up.
7. Reinstall the quadrant cover.
—END—
32-60-12
Page 32-59
December 1, 1978
2F18
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL