Garmin Flight Deck 100 User Manual

®

190-00728-04  Rev. A

88

The following annunciations and alerting functions are displayed on the PFD. Refer to Appendix A for more

information on alerts and annunciations.

®

The System Messages Window conveys messages to the flight crew regarding problems with the Prodigy

®

 

System.  When a new message is issued, the MSG Softkey flashes to alert the flight crew. It continues to flash
until selected, which opens the System Messages Window and acknowledges the message(s) which initiated
the flashing.  When the window is open, messages for which the trigger conditions no longer exist turn gray.  
Messages generated while the window is open are not automatically displayed, but cause the MSG Softkey to
begin flashing again.  Pressing the MSG Softkey while the System Messages Window is open closes the window,
unless the MSG Softkey is flashing.

Critical values generated by redundant sensors are monitored by comparators.  If differences in the sensors 

exceed a specified amount, the Comparator Window appears in the upper right corner of the PFD and the 
discrepancy is annunciated in the Comparator Window as a MISCOMP (miscompare).  If one or both of the 
sensed values are unavailable, it is annunciated as a NO COMP (no compare).

Reversionary sensor selection is annunciated in a window on the right side of the PFD.  These annunciations 

reflect reversionary sensors selected on one or both PFDs.  Pressing the SENSOR Softkey accesses the ADC1, 
ADC2, ADCSTBY, AHRS1, AHRS2, and ATTSTBY softkeys. These softkeys allow switching of the sensors
being  viewed  on  each  PFD.    With  certain  types  of  sensor  failures,  the  system  may  make  sensor  selections
automatically.  The GPS sensor cannot be switched manually.