lUiliUBnmlf
Imm
111.111
.a
••
al
PITOT
HEAT
UGHT
IU.UMlNATED
(If
Installed)
nIumination
of a Pitot Heat
light
indicates that one or
mom
of the pitot tube
heaters are inoperative or one or both PlTOT
HEAT
switches are
OFF.
Sev-
eral configurations of the pitot heat monitor exist:
•
Single
PlTOT
HEAT
light
on
"the
instrument panel
• L PlTOT
HEAT
and R
PlTOT
HEAT
lights on the instrument panel
•
Single
PlTOT
HT
light
on the annunciator panel
1.
PlTOT
HEAT
Switches -
Check,
On.
2. L
and
R PlTOT
HT
Circuit
Breakers
(Ess
Bus)
- Check,
In.
3. Pilot's and Copilot's
Air
Data
Instruments - Crosscheck.
STABIUZER
HFAT
FAILURE
With
the
STAB
WING
HEAT
switch
On, a
stabilizer
heat
failure
is
indicated
by the
STAB
TEMP
Indicator remaining in the
red
(below
35°F
[1.
7°C))
range.
1.
STAB
&
WING
HT
Circuit
Breaker (copilot's main
bus)
- Check
and
reset
if
necessary.
2.
Engine
RPM -
Adjust
as
required
to maintain
STAB
TEMP
indica-
tor
in
the green range.
3.
If
STAB
TEMP
indicator remains
in
the
red
range:
a.
Ay
out of
icing
conditions,
if
possible.
b.
Do
not extend
flaps
beyond
20°.
4.
On
aircraft 35-067 thrll 35-112
except
35-107 and 36-018 thrll
36-031,
if
cabin
altitude
climbs
to an unacceptable
level,
CABIN
AIR
Switch
-MAX.
Descend.toan acceptableleve1.
Ice
accumulation on the
stabilizer
may
cause deterioration
in
trim
speeds
and changes
in
handling characteristics.
Low
speed 8ght should be ap-
proached
with
care so that detection of abnormal
fMng
qualities can be
ob-
tained.
It
may
be
necessary to
land
with
flaps
at
20° as some buffet and/or
some nose pitch
may
be
encountered with the
flaps
full
down.
For
landing
procedure
with
a
stabilizer
heat
failure,
refer to lANDINGS,
this section.
4-4
FAA
APPROVED
4-30-76
REISSUED
2-25-81.
CHANGE
10
To Next Page
Loading...
