Piper Navajo PA-31 Service Manual page 254

PIPER NAVAJO SERVICE MANUAL
h.
After the system is properly rigged for stroke and position indication, place the positive probe of the
digital voltmeter in RR at the amplifier and the negative probe in the RL. Select the flaps full DOWN and
monitor the voltage throughout the extension. Voltage is not to exceed .15 volts at any time.
NOTE
The System should be allowed to warm up for approximately five
minutes before making any electrical adjustments.
i.
Run the flaps through three complete UP, DOWN cycles to ensure proper operation of flaps.
j.
Check flap deflection angles with rigging tools (if applicable) installed at DOWN. APPROACH
and UP settings, observing Note below.
NOTE
When measuring flap deflection angles. lift the trailing edge of the
flap to eliminate play between rollers and track slots.
If out of limits. repeat the rigging procedure. beginning with step 17. If satisfactory. remove rigging tools
(if applicable) and install screws in rivnuts on upper wing surface.
k.
Locate the flap system test switch on the aircraft instrument panel. Move the flap selector handle to
the full DOWN position and activate the test switch at approximately 15 degrees of flap travel. Observe that
the wing flap light (amber) located in the annunciator panel is illuminated and that flap extension hasstopped.
Release flap system test switch. Observe that annunciator light is extinguished and flaps continue to extend to
the full DOWN position.
1.
Remove the 30 amp fuse installed in step 13. and install all access plates removed.
5-85. REMOVAL OF FLAP CONTROL BOX.
a.
Remove the knob from the control box.
b.
Remove the electrical connector from the rear side of the control box.
c.
Remove the two screws that secure the control box to the instrument panel.
d.
Remove the control box from the instrument panel.
NOTE
It is recommended that the flap control box (selector) be sent back to
manufacturer for ser icing. Environ Division of Calco Mfg. Co. 506
Highway 27 North. Haines City. Florida 33844.
5-86 INSTALLATION OF FLAP CONTROL BOX.
a.
Install the flap control box in the instrument panel.
b
Install the two screws that secure the control box.
c. Connect the electrical leads.
d. Install the knob.
Revised: 10/12/83
SURFACE CONTROLS
Effectivity
CALCO
1K14