2. To skip an item, press SKIP. Note
that the red cursor moves to the next
item and that the skipped item
remains displayed in green.
3. To return to an unchecked item,
press RCL. The display will return to
displayed in red.
4. When the last unchecked item in the
emergency procedure is checked off
procedure have been checked and
COMPLETE is printed in red in the
center of the last available line on the
last page of the procedure.
(11) Re-initialization. If the checklist display is
not functioning properly, re-initialize the checklist
operation as follows:
1. Set rotary switch to OFF.
2. Set rotary switch to any desired
INDEX or LIST position.
3. Press PAGE push button to display
first page of chosen index or list.
(12) Auxiliary. When the rotary switch on the
control unit is set to AUX, the interface computer is
available for inputs from the auxiliary equipment.
(13) Pilot Entry Keyboard. The operator may
use a hand-held keyboard, Figure 3C-9, to enter data
of his own into a section of the Data NAV system
memories for display on the Indicator. Data entered
by the pilot is stored in a memory that is not
permanent in the same sense as those memories
containing the airplane checklists. However, the non-
permanent memory is kept alive by a 3.6-volt nickel-
cadmium battery that recharges each time the Data
NAV system is turned on. Depending upon the state
of charge and the storage temperature, the battery
could keep the pilot-entered data intact for as long as
6 months. The keyboard coil-cord is plugged directly
into a bulkhead-type connector mounted for pilot
convenience. The bulkhead connector, in turn, is
wired by way of the aircraft wiring to the Data NAV
At the top of the keyboard unit is the ON /
OFF switch that controls a 5-volt input.
Whenever the keyboard is being connected
to, or disconnected from, the aircraft
connector, this switch must be in the OFF
position to prevent possible damage to
integrated circuits inside the keyboard.
(a) Keyboard Controls. All controls used
to operate the keyboard functions are located on the
keyboard panel. The keyboard unit has 45 keys
consisting of 26 alphabetics (A through Z); 10
numerics (0 through 9); comma; period; dash ();
backspace (¬ ); forward space (® ); cursor return
(CR); space (SP); home cursor (HC); and mode. The
MODE key selects either the data entry mode or the
Alternate functions are available for 13 keys:
Clear ( CLR); roll up (- ); clear entry (CLE); enter
(ENTER); sign change (+/-); exchange (C ); delete
line (DEL); set beginning of stack (SBS); beginning of
stack (BOS); and the arithmetic operations (+, , x, ÷).
The alternate functions, operational only during the
calculator mode, display above the affected keys.
1. ON/OFF Power Switch
2. Data Entry Keyboard
Figure 3C-9. Pilot Entry Keyboard