Problem with Function to Auto-Populate Data

Problem with Function to Auto-Populate Data

We have a custom module (Passengers) and need to auto-populate several fields in that module with data from contact records associated with each Passenger.

Some of the functions are working properly but I am having trouble with others. I cloned/duplicated the functions that are working and modified them so the syntax should be consistent. 

Can anyone advise on what the problem may be based on the examples attached?