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• HGS Test Menu.
HGS Test Parameters
The Test Mode can be entered only on the ground when ground speed is
less than 10 knots.
HGS Test Start
To start an HGS Test:
1. Push the HCP TEST pushbutton, and see that the light in the upper-left
corner of the pushbutton comes on. The HGS automatically exits from
these functions if they are active:
• Elevation data entry
• Glideslope data entry
• Clear function.
2. The HGS initially does all BIT functions. This test blanks the
Combiner display and causes the HCP FAULT light to come on until
the system passes all the tests (approximately two seconds if normal). If
the BIT fails, the HCP FAULT light stays on, a fault code is shown on
the HCP STBY display line, and “HGS FAIL” shows in red on the
PFDs. Additionally, on the fault, the Combiner display could remain
blank. If BIT detects more than one fault, the HC displays all fault
codes in two-second intervals, repeating until all the faults are cleared.
3. Record any fault code data for maintenance action. If there are no
faults, “TEST” shows on the ACT display line and the HGS TEST
MENU (Figure A-2) shows on the Combiner.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 A-9
The cursor (“>”) indicates the current selection. Use the HCP BRT+ (up)
and DIM- (down) pushbuttons to move the cursor to a menu item. Push the
ENTER pushbutton to select the menu item.
In data displays, an arrow indicates additional data is available for viewing.
The arrows point up and/or down next to the data fields. Use the BRT+ and
DIM- pushbuttons to scroll the displays.
To manually exit the Test function, push the TEST pushbutton.
Figure A-2:
HGS Maintenance Menu Display (example)
A brief explanation of each Test Menu item is contained in the subsections
that follow:
• Existing Faults
• Recorded Faults
• HC Part Numbers
• OPC Configuration.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
A-10 November 2002 9701-1153 Rev A
Existing Faults
The Existing Faults display shows all of the current faults. Faults that have
an effect show in reverse of the order in which they are found. The most
recent shows on the top, the oldest is on the bottom. Faults that have no
effect show after all faults that do have an effect. If no faults are identified,
“NO ACTIVE FAULTS” shows on the display. A fault stays on the display
for two seconds after it becomes inactive.
The display shows a maximum of five faults at one time. When more than
five faults are identified, a down arrow shows to the left of the bottom fault
on the display. Use the DIM- pushbutton to move down the list. When the
display does not show the top of the list, an up arrow shows to the left of the
top fault on the display. Use the BRT+ pushbutton to move up the list.
Figure A-3 is an example of an Existing Faults display.
To go back to the HGS Maintenance Menu, push the HCP CLR pushbutton.
To go out of the Maintenance Test Submode, push the TEST pushbutton.
Figure A-3:
Existing Faults Display (example)
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 A-11
Recorded Faults
The Recorded Faults display shows the faults stored in the HGS Computer
non-volatile memory. Figure A-4 is an example of a Recorded Faults
display.
This Combiner display gives access to all recorded fault data that are kept in
the Computer. These data include:
• LEG: shows which flight leg is on the display. The flight legs are
numbered from the most recent (-1) to the oldest (-128). A flight leg
starts after the aircraft exceeds 10 knots ground speed. The leg
continues until the aircraft touches down and slows through 10 knots
ground speed. When there are 128 recorded flight legs, a new flight leg
erases the oldest flight leg.
• DATE AND TIME: shows when the flight leg started. The date format
is DDMMYY (day, month, year). The time format is HRMINZ (hours,
minutes, Zulu).
• ENTER LEG #: to change to a different flight leg, the leg number is
put in with the HCP numeric keypad. The box area shows the number
as it is put in.
• XXX LEGS: shows the total number of flight legs that are kept in the
Computer’s non-volatile memory.
• EFFECT: shows the highest-level flight deck effect caused by the fault
at the time it is recorded.
• FAULTS: shows the LRU and type of fault detected. If all signals from
an LRU have the same fault, or the whole data bus from the LRU is
　
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