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RWY line flashes. If the runway length is less than the lower
limit, then “L 5000?” (or “L 1524?”) on the RWY line flashes.
3. After the RWY line shows the correct number, push the ENTER
pushbutton. The RWY line shows the new length with a prime (“ ′ ”)
for feet, or “m” for meters. The RWY pushbutton light goes off.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 2-11
Figure 2-7:
Runway Length Data Entry (example)
Automatic Operations of Runway Length: The automatic operation for
runway length data entry is:
• If the ENTER pushbutton is not pushed after a new runway length is
entered, the new number is not accepted. If the STBY, RWY, G/S, or
ACT pushbutton is pushed before the ENTER pushbutton is pushed,
the runway length goes back to the number and status that were set
when data entry started.
• After a power interruption or HC reset in flight, the runway length goes
back to the last number and status set.
• After a power interruption or HC reset on the ground, the runway
length becomes invalid (RWY line shows a “?”).
• If the TEST pushbutton is pushed on the ground, the runway length
becomes invalid (RWY line shows a “?”).
• After a takeoff, when the aircraft climbs through 5000 feet above
ground level (AGL), the runway length becomes invalid (RWY line
shows a “?”). The runway length for the next runway should be set.
• When the aircraft lands and the airspeed is less than 20 knots, the
runway length becomes invalid (RWY line shows a “?”).
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
2-12 November 2002 9701-1153 Rev A
Runway Elevation Data Entry
Before HGS landings, set the runway elevation. Runway elevation is always
in feet.
Follow these steps to set a new runway elevation. Figure 2-8 shows an
example.
1. Push and release the RWY pushbutton until the RWY line shows an
“E” that is followed by a space, a solid arrow that points to the right,
and the last accepted elevation. The RWY pushbutton light comes on.
2. If the TDZE is below sea level, push the DIM- pushbutton. The last
accepted elevation is replaced with a minus sign (“-”) and a flashing
cursor (“_”) to its right.
3. If the Touchdown Zone Elevation (TDZE) is above sea level, use the
numeric keypad to put in the first number of the new runway elevation.
The last accepted elevation is then replaced with the new number and a
flashing cursor (“_”) to its right.
4. Use the numeric keypad to enter the new runway elevation number. If
five digits are put in, the system removes the cursor and ignores further
keypad entries. If an error is made, push the CLR pushbutton as a
backspace. Each push of the CLR pushbutton erases the last digit.
5. After the correct number shows on the RWY line, push the ENTER
pushbutton to accept the TDZE. This step removes the arrow and
cursor and adds a prime (“ ′ ”) after the number to show the runway
elevation in feet. The RWY pushbutton light goes off.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 2-13

　
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