Engineering Solution: EGPWS Customer Options

Mark V and Mark VII EGPWS Customer Options Selection

The Honeywell EGPWS installations, typically performed as a GPWS upgrade, is accomplished on simulators that have either hardware GPWS LRUs or simulated GPWS systems. This modification gives the aircraft the “enhanced modes” due to having the terrain awareness feature required by regulatory authorities. Terrain maps are presented to the pilots on either EFIS or supplementary displays.

ASC has completed many of these installations on aircraft ranging from Dash 8-400 (Q400) to the Boeing 777 and for most different flight simulator manufacturers. This is a routine installation for ASC.

Customer options selection for the Honeywell EGPWS Mk V and Mk VII present an interesting challenge because there are approximately 1,000,000,000,000,000 combinations of customer options that may be selected for any give aircraft type. Some simulators allow for more than 1 aircraft type to be configured, so that increases the number of possible combination of options even further.

The theory of the programming pin selection for the Mark V or Mark VII allows one program pin to be set to one of 10 possible states. There are 18 programming pins in total (not including a parity pin). The following schematic shows the manner in which the programming pins are laid out:

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