TCAS791
Operating Instructions
Pilot’s Guide
2-9
Preflight Instructions
Turn On the TCAS791
a. If you’re using a display other than the CD605, turn on that alter-
nate display system and set it to display TCAS information.
b. If you’re using an alternate display that requires a discrete TCAS
Auto/Man switch, make sure the switch is set to the desired mode.
c. Rotate the DIM/OFF knob on the CD605 clockwise about 180
degrees. If you’re using an alternate display, move the discrete
TCAS ON/OFF switch to the ON position.
The TCAS791 will begin its power-up and initialization routine.
During this power-up and initialization, the CD605 will display
the startup screen as shown in figure 2-4. The startup screen lists
the firmware version numbers. After about 35 seconds, the
TCAS791 will go into standby and the CD605 will display the
standby screen as shown in figure 2-5.
Some alternate displays will not display the startup and standby
screens as shown; instead, they will display the message TCAS
FAIL until the TCAS791 completes its power-up and initializa-
tion routine, then they will display a different standby screen, such
as TCAS OFF.
Run the Operator-Initiated Self Test
You should run the operator-initiated self test before the first flight of
the day or as specified in the specific Aircraft Operating Manual (AOM).
The self test function is inhibited unless the aircraft is on the ground
and the TCAS791 is in standby.
a. Set the pilot’s barometric altimeter to 29.92 and make note of the
indicated pressure altitude.
Figure 2-4. Startup Screen
Figure 2-5. Standby Screen
