Hi Hope,
By Jess's very minimal standards, FltData
is a perfectly good JavaBean class.
The problem, if your code is exactly as shown, is that Jess is case sensitive, and uses the JavaBeans standard for naming properties, according to which a method getFltNum gives rise to a property "fltNum", not "fltnum", with a capital "N".
You can see the property names by displaying the deftemplate that Jess creates from your Bean class (using the name "data" that you used in the defclass
(ppdeftemplate data)
This should show a slot named "fltNum", along with other ones.