Piper Navajo PA-31 Service Manual page 675

PIPER NAVAJO SERVICE MANUAL
TABLE X-III.
TROUBLESHOOTING CHART (PRESSURE SYSTEM) (cont.)
Trouble
Cause
Remedy
Low system pressure.
High system pressure.
Regulator valves incor-
rectly adjusted.
Leak-
ing of the system lines
or fitting.
Regulator valve incor-
rectly adjusted.
Adjust regulatorvalves
in accordance
with
Adjustments
of this
section.
Check all
lines and fittings.
Adjust in accordance
with Adjustments
of
this section.
DE-ICER BOOTS INSTALLED
De-Icers do not inflate.
Both engines operating
at minimum cruise
RPM or either engine
at 2500 ground RPM.
Open circuit breaker.
System connection
loose
or wire broken.
Push circuit breaker
to
reset.
Tighten or repair as
required.
Timer not functioning.
Control valves not func-
tioning.
Piping lines blocked or
not connected.
Test or replace as
required.
Make electrical
test.
Check for sticking
poppet. Clean.
Blow out lines and in-
spect connections.
Make air leakage test.
De-Icers inflate slowly.
(Inflation time - 6 sec-
onds. )
Piping lines partially
blocked or not con-
nected securely.
Blow out lines and in-
spect connections.
Make air leakage test.
Reissued: 10/12/79
INSTRUMENTS
3E13