Piper Navajo PA-31 Service Manual page 257

PIPER NAVAJO SERVICE MANUAL
o. If the RC voltage readings are too high or too low. the problem is either in the harness wiring or the
control box. Test the harness wiring, if defective repair or replace the harness wiring. If the harness wiring is
good replace the control box.
p. Connect the voltmeter between test jacks RRand RL on the amplifier. Use long enough meter leads
so the person adjusting potentiometers can also read the voltmeter. If this voltage exceeds 0.5 volts the shut
down is due to flap asymmetry. Correct cause of asymmetry and rerig flap system.
q. Connect the voltmeter between test jacks RR and GND on the amplifier. Voltage should equal RC
voltage within 0.3 volts.
r.
Connect the voltmeter between test RL and GND on the amplifier. Voltage should equal RC
voltage within 0.3 volts.
s. If voltage readings in either steps q or r exceeds 0.3 volts shut down is due to flap asymmetry
Correct cause of asymmetry and rerig flap system.
t. If the problem is not located at this point, the amplifier is defective and must be replaced.
u. Turn battery master switch OFF or remove external power from the aircraft.
v. Connect flex shaft(s) to motor assembly. Flex shaft(s) nut(s) must be lockwired to motorassembly
Revised: 10/12/83
Effectivity
CALCO
SURFACE CONTROLS
1K17