Time/Date Window YA721, YA722
.
displays time (hours, minutes) when time is selected with the date control

.  
alternately displays day–month and year when date is selected with the
date control.

Chronograph Second Hand
.
indicates chronograph seconds

.
controlled by the CHR control.

Copyright . The Boeing Company. See title page for details.
Flight Instruments, Displays -EFIS Instruments (PFD) – Controls 737 Flight Crew Operations Manual

Elapsed Time (ET) and RESET Pushbutton YA613 - YA687, YA801 - YC413, YK101 - YK104
Controls the elapsed time function:
.
select the ET pushbutton once to run the elapsed time

.
select the ET pushbutton again to hold the elapsed time

.
select the RESET pushbutton to set the elapsed time to 0.

The RUN or HLD symbol is displayed on the lower left part of the LCD display.

Elapsed Time (ET) Pushbutton YD651 - YD655
Controls the elapsed time function:
.
select the ET pushbutton once to run the elapsed time.

.
select the ET pushbutton again to hold the elapsed time.

.
select the ET pushbutton again to continue the elapsed time.

.  
select the ET pushbutton for 2 seconds to set the elapsed time to 0 and
clear the display.

The ET and RUN or HLD symbols are displayed below the elapsed time.

Elapsed Time (ET) Selector (three position, rotary) YA721, YA722
Controls the elapsed time function:
RESET – returns ET display to zero (spring loaded to HLD).
HLD (hold) – stops the elapsed time display.
RUN – starts the elapsed time display.

TIME/DATE Pushbutton YA613 - YA687, YA801 - YK104
Controls the time/date function:
.
select the TIME/DATE pushbutton once to see UTC time

.
select the TIME/DATE pushbutton again to see UTC date

.
select the TIME/DATE pushbutton again to see manual time

.
select the TIME/DATE pushbutton again to see manual date.

The UTC or MAN symbol is displayed on the upper right part of the LCD display.
In MAN mode, clock time and date come from the clock. In UTC mode, clock time and date come from the global positioning system.
Copyright . The Boeing Company. See title page for details.
10.16.24   June 1, 2005

Flight Instruments, Displays -EFIS Instruments (PFD) – Controls
737 Flight Crew Operations Manual
Date Control
Controls the date display:
PUSH – displays date (day, month) alternating with year.
PUSH – returns display to time.

SET Pushbutton YA613 - YA687, YA801 - YC413, YK101 - YK104
Controls the setting of manual time and date:
With manual time displayed:
.  
select the SET pushbutton once and the hours flash, use the plus or minus
pushbutton to adjust the hours

.  
select the SET pushbutton again and the minutes flash, use the plus or
minus pushbutton to adjust the minutes

.
select the SET pushbutton again to run the time.

With manual date displayed:
.  
select the SET pushbutton once and the day flashes, use the plus or minus
pushbutton to adjust the day

.  
select the SET pushbutton again and the month flashes, use the plus or
minus pushbutton to adjust the month

.  
select the SET pushbutton again and the year flashes, use the plus or
minus pushbutton to adjust the year

.
select the SET pushbutton again to run the date.

Note:  A delay greater than one minute while setting the time or date results in the clock reverting to the previous time/date setting.

Elapsed Time (ET)/Chronograph Window YA721, YA722
.
displays elapsed time (hours, minutes) or chronograph minutes

.
the chronograph display replaces the elapsed time display

.  
elapsed time continues to run in the background and displays after the
chronograph is reset.

Elapsed Time (ET)/Chronograph Indicator YD651 - YD655
.
displays elapsed time (hours, minutes) or chronograph minutes

.
the chronograph display replaces the elapsed time display

.  
elapsed time continues to run in the background and displays after the
chronograph is reset.

Copyright . The Boeing Company. See title page for details.
Flight Instruments, Displays -EFIS Instruments (PFD) – Controls 737 Flight Crew Operations Manual

Elapsed Time (ET)/Chronograph Indicator YA613 - YA687, YA801 - YC413, YK101 - YK104
　
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