Piper Arrow IV Turbo Maintenance Manual page 347

G. With the airplane at a safe altitude, slow the airplane to a glide of 120 KIAS for PA-28RT-201T or
110 KIAS for PA - 2 8 RT-201 with the gear selector handle up and the throttle reduced to power
O F F. (Gear unsafe light and horn will indicate when power is reduced.) At 120 KIAS for PA -
28RT-201T or 110 KIAS for PA-28RT-201, slow the airplane at a rate of one (1) knot per second
until 103 KIAS for PA-28RT-201T or 95 KIAS for PA-28RT-201 is obtained, hold the airplane at
this speed.
Adjustment of the nut may be necessary to increase or decrease
the spread between the gear up and gear down actuation speeds.
To expand the spread between these speeds, loosen the nut.
Tighten the nut to bring the airspeeds closer together. Whenever
the nut is adjusted, it may be necessary to readjust the tension on
the springs and to repeat the nut adjustment procedure. If the
eccentric bolt is installed on the unit being adjusted, CAUTION
should be observed so as not to disturb its position in relation to
the rest of the unit.
H. With the glide established, turn the adjustment screw clockwise until the gear drops. (First
indication of gear dropping will be that the gear unsafe light comes ON.)
I. Climb again to a safe altitude and check that the gear drops at the correct airspeed.
J. Land the airplane and tighten the adjustment screw jam nut.
3. To check adjustment of electrical switch, the following procedure may be used:
A. Place the airplane on jacks. (Refer to Jacking, Chapter 7.)
B. Move the mixture control back to idle cutoff and the throttle to full forward to prevent gear
warning horn from sounding during adjustment.
C. Ascertain that the actuator tension springs are properly adjusted according to Step 2.
D. Retract the landing gear hydro-electrically by turning the master switch ON, raising the emergency
gear extension lever and moving the gear selector handle to the up position. The emergency gear
extension lever must be retained in the up position to keep the gear up.
E. Check for proper switch operation by the following procedure:
(1) Turn master switch ON and move gear selector handle to the up position. Pump should not
operate.
(2) Move the emergency gear extension lever to the up override position. Pump should operate and
gear should retract.
(3) With selector lever up, slowly lower emergency gear extension lever to allow gear to drop to
down position. The pump should not operate at any time during extension.
(4) Turn master switch OFF.
F. Check gear operation in the normal manner with the use of the gear selector handle. The
emergency extension lever must be held in the up override position.
G. Ascertain that gear is down and locked and remove airplane from jacks. Then flight check the
retractable landing gear system. (Refer to Operational Check of Retractable Landing Gear
System.)
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
—NOTE—
2C20
29-10-11
Page 29-26
December 1, 1978