That should be set to "G" by default, and can be set in the INI.
It looks like there is some problem spawning the "aw139" model which is causing Coastal to crash when it verifies models. Did you previously install the AW139 as a separate standalone DLC? If so, remove any other installations of that vehicle and try again. Before loading LSPDFR, try spawning that model by opening the RPH console and typing "SpawnAndWarp aw139".
I don't see any errors in your logs. Check the keybindings in your INI and try setting it to another key.