2.
Abnormal Reading on Propeller Deice
Ammeter
a.
Zero Amps
Check
propeller deice switch.
lf
the circuit breaker
in the switch has tripped, a
wait
of
approximately
30 seconds is necessary before resetting
the
switch to the ON position.
lf
ammeter reads 0 and
switch has
not
tripped or
if
ammeter still reads 0
after the switch has been reset,
turn
the
switch
off
and
consider
the
propeller
deice
system
inoperative.
b.
Zero to
20
Amps (2 Blade)
Zero
to 30 Amps
(3
Blade)
lf
propeller deice system ammeter occasionally
or
regularly indicates less than
20
amps (2 blade),
30
amps (3 blade). operation
of
the propeller deice
svstem
can
continue unless serious propeller
im-
balance results from irregular ice throw-offs.
c.
More than
24
Amps
(2
Blade)
More than
34
Amps
(3
Blade)
lf
the propeller deice system ammeter occasionally
or
regularly indicates more
than
24 amps
(2
blade).
34
amps (3 blade). the system should not
be
oper-
ated unless the need for propeller deice is urgent.
NORMAL
PROCEDURES
PREFLIGHT
1.
With
engine operating, place propeller deice switch in
the
ON position.
2
of
3
FAA
Approved
Revised:
October
1977
P/N
130694
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