Section 917
BENDIX/KING KT 73 Transponder
917 - 4
Page Date: 31. March 2009
Pilot´s Operating Handbook
EXTRA 300L
917.1.1
FUNCTION SELECTOR KNOB
The following operating modes can be chosen by the Function Selector Knob:
OFF
Powers off the KT 73. When the unit is turned to another mode, it will reply or squitter within two
seconds, according to the selected mode.
FLT ID
Selects the Flight ID mode displaying the 8 character Flight ID or registration marking of the
airplane. When in Flight ID mode, the transponder will not reply to any interrogations.
SBY
Selects the Standby mode displaying the last active identification code. When in Standby mode,
the transponder is energized but will not reply to any interrogations.
TST
Selects the Test mode displaying all display segments for a minimum of 4 seconds. A series of
internal tests is performed to check its integrity, verify all aircraft specific configuration data and
make hardware and squitter checks. When in Flight TST mode, the transponder will not reply to
any interrogations. In addition the display brightness can be manually adjusted by rotating the
BRT
knob.
GND
Selects the Ground mode displaying '
GND
' in the altitude window. When in Ground mode, the
transponder will not reply to ATCRBS, ATCRBS/Modes S All-Call and Mode S-only All-Call
interrogations. It will continue to generate Mode S squitter transmissions and reply to discretely
addressed Mode S interrogations.
ON
Powers on the transponder in Mode A, C and S. In this mode the transponder replies to
interrogations, as indicated by the Reply Symbol. Replies do not include altitude information.
ALT
Powers on the transponder in Mode A, C and Mode S. In ALT mode, the transponder replies to
identification and altitude interrogations, as indicated by the Reply Symbol. Replies to altitude
interrogations include standard pressure altitude received from a separate encoder.
917.1.2
CODE SELECTION
The Identification Code selection is done with 4 ATCRBS Code Selector Knobs that provide 4,096
active identification codes. Each of the 4 Code Selector Knobs selects a separate digit of the
identification code.
IMPORTANT CODES:
1200 The VFR code for any altitude in the US (Refer to ICAO standards elsewhere)
7000 The VFR code commonly used in Europe (Refer to ICAO standards)
Summary of Contents for 300L
Page 2: ...Left blank intentionally ...