Piper Navajo Chieftain PA-31-350 Service Manual page 592

NAVAJO CHIEFTAIN SERVICE MANUAL
Trouble
Instrument read
high.
Instrument read
Airspeed change
aircraft is banke
TABLE X-VI. AIRSPEED TUBES AND INDICATOR (cont.)
Cause
Is
Internal Fault.
Rep
Leaking static system.
Find
Is low.
Internal Fault.
Repl
Leaking static system.
Find
Pitot-Static head not
Reali
aligned correctly.
head.
es as
Water in static line.
Rem
Remedy
d.
Pitot tube does not heat
or clear itself of
ice with switch
"ON".
Circuit breaker
popped.
Open circuit.
Excessive voltage
drop between battery
and pitot head.
Heating element
burned out.
instru
out li
to pit
Reset
Repai
Check
head.
Repla
ce instrument.
leak and correct.
ace instrument.
leak and correct.
gn pitot-static
ve lines from static
ments and blow
nes from cockpit
ot-static head.
ir.
voltage at pitot
ce pitot head.
NOTE
When any connections in static system are opened for checking,
system must be checked per FAR 23.1325.
10-44. REMOVAL AND REPLACEMENT.
(Refer to paragraph 10-94 of this section.)
Revised: 10/15/82
3 14
3B14
INSTRUMENTS