20
CESSNA 400 TRANSPONDER
PILOT'S OPERATING HANDBOOK
AND ENCODING ALTIMETER
SUPPLEMENT
SECTION 2
LIMITATIONS
There is no change to the airplane performance when this avionic
equipment is installed. However, the encoding altimeter used in this
installation does have a limitation that requires a standard barometric
altimeter be installed as a back-up altimeter.
SECTION 3
EMERGENCY PROCEDURES
TO TRANSMIT AN EMERGENCY SIGNAL:
1.
Function Switch -- ON.
2.
Reply-Code Selector Switches -- SELECT 7700 operating code.
TO TRANSMIT A SIGNAL REPRESENTING LOSS OF
COMMUNICATIONS (WHEN IN A CONTROLLED ENVIRONMENT):
1.
Function Switch -- ON.
2.
Reply-Code Selector Switches -- SELECT 7700 operating code for 1
minute; then SELECT 7600 operating code for 15 minutes and then
REPEAT this procedure at same intervals for remainder of flight.
SECTION 4
NORMAL PROCEDURES
BEFORE TAKEOFF:
1.
Function Switch -- SBY.
TO TRANSMIT MODE A (AIRCRAFT IDENTIFICATION) CODES IN
FLIGHT:
1.
Reply-Code Selector Switches -- SELECT assigned code.
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1 July 1979
20
PILOT'S OPERATING HANDBOOK
CESSNA 400 TRANSPONDER
SUPPLEMENT
AND ENCODING ALTIMETER
2.
Function Switch -- ON.
3.
DIM Control -- ADJUST light brilliance of reply lamp.
NOTE
During normal operation with function switch in ON
position, REPLY lamp flashes indicating transponder
replies to interrogations.
4.
ID Button -- DEPRESS momentarily when instructed by ground
controller to "squawk IDENT" (REPLY lamp will glow steadily,
indicating IDENT operation).
TO TRANSMIT MODE C (ALTITUDE REPORTING) CODES IN FLIGHT:
1.
Off Indicator Warning Flag -- VERIFY that flag is out of view on
encoding altimeter.
2.
Altitude Encoder Altimeter Setting Knob -- SET IN assigned local
altimeter setting.
3.
Reply-Code Selector Switches -- SELECT assigned code.
4.
Function Switch -- ALT.
NOTE
When directed by ground controller to "stop altitude
squawk", turn Function Switch to ON for Mode A opera-
tion only.
NOTE
Pressure altitude is transmitted by the transponder for
altitude squawk and conversion to indicated altitude is
done in ATC computers. Altitude squawked will only
agree with indicated altitude when the local altimeter
setting in use by the ground controller is set in the
encoding altimeter.
5.
DIM Control -- ADJUST light brilliance of reply lamp.
TO SELF-TEST TRANSPONDER OPERATION:
1.
Function Switch -- SBY and wait 30 seconds for equipment to
warm-up.
2.
Function Switch -- ON or ALT.
3.
TEST Button -- DEPRESS and HOLD (Reply lamp should light
with full brilliance regardless of DIM control setting).
4.
TEST Button -- RELEASE for normal operation.
1 July 1979
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