Removal Of Flap Control Box; Installation Of Flap Control Box; Removal Of Flap Control Amplifier; Installation Of Flap Control Amplifier - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
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 has stopped.
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.
5-87. 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 servicing. Environ Division of Calco Mfg. Co.,
506 Highway 27 North, Haines City, Florida 33844.
5-88. 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.
5-89. REMOVAL OF FLAP CONTROL AMPLIFIER.
a. Open access door in nose of airplane to gain access to amplifier at station 35.00
b. Disconnect the electrical plug from the amplifier.
c. Remove the attaching screws and remove the amplifier from the airplane.
5-90. INSTALLATION OF FLAP CONTROL AMPLIFIER.
a. Install control amplifier in airplane and secure with attaching screws.
b. Connect the electrical plug to the amplifier.
c. Check rigging and adjustment of flaps per instructions given in this section.
d. Close and secure access door.
Revised: 10/5/83
SURFACE CONTROLS
Effectivity
1K5
CALCO