CLOCKS
The instrument panel is equipped with two
multi-function chronometers (Figure 16-58).
The clocks are located outboard of the pilot and
copilot PFDs. Each clock displays GMT, local
time (LT), flight time (FT) and elapsed time
(ET).
For operation, each clock has two buttons and
an LED display. The “SEL” (SELECT) button
selects what is displayed, and the “CTL” (CON-
TROL) button resets FT to zero when held de-
pressed for 3 seconds. To reset and start ET the
CTL button is pushed momentarily.
To set the clock to GMT or LT, both the CTL
and the SEL buttons must be pressed simulta-
neously. The CTL button is then pressed to in-
crement the flashing digit to the desired value.
Pressing the SEL button enters the selected
value and toggles to the next digit to be set.
The clocks receive 28 VDC power through
the 1 amp L and R CLOCK circuit breakers,
located within the INSTRUMENT/INDICA-
TIONS group on the pilot and copilot circuit
breaker panels.
L E A R J E T 4 5
P I L O T T R A I N I N G M A N U A L
16-106
FOR TRAINING PURPOSES ONLY
FlightSafety
international
03:48
GMT
LT
FT
ET
SELECT
CONTROL
SEL
CTL
DAVTRON
M850
CHRONOMETER
Figure 16-58. Multi-Function Chronometer