Cessna 172P - Page 237

PILOT'S OPERATING
HANDBOOK
SUPPLEMENT
4
CIRCI'LATION
FAN
SYSTEM
MODEI,
172P
sEcTloN
3
EMERGENCY
PROCEDURES
There
is no change
to
the a,irplene
emergency
prooedures
when the
circulation
fan system
is installed.
sEcTloN
4
NORMAL
PROCEDURES
PREFLIGHT
INSPECTION
In hot weather
during
the
preflight
(walk-around)
inspection, open
both cabin
doors to aid in cool-down
of the cabin
before
flight.
OPER,ATION
ON GR,OUND
After
proflight
inspection
and engine
start,
use
the
following
proce-
dures for
best utilization
of
the system
prior
to flight.
1. Cabin
Window(s)
--
OPEN.
2. Cabin
.A'ir Control
Knob
-- PULL
OUT.
3.
Wing
Root
Ventilators
--
OPEN.
4. CIRCULATION
FAN Control
Khob
-- HI.
BEFORE TAKEOFF
1.
Cabin
Window(s)
--
CLOSED
AND
LOCKED.
OPER,ATION IN FLIGHT
The inflight
operation of the circulation
fan system
is basically
the
same as
for
ground
operation. The cabin
air control
knob,
wing
root
ventilators, and the circulation
fan
aontrol
knob may be
adjusted,
as
required to
provide
the
desired
cabin ventÍIation.
After landing,
the
cabin window(s) may be opened
while
taxiing to the
tie-down
are& or ramp to help
ventilate the cabin.
3
80 May
1980