When in 'Mech mode, it operates as a normal 'Mech with the normal abilities.
When in ASF mode, it operates as a normal ASF with the normal abilities.
When in LAM mode, it flies like a WiGE. There are rules for flying WiGEs in the movement area of BattleForce that tell you how. Now LAMs can pull up and raise their elevation which WiGEs can't do, but in general for LAMs you start with the WiGE rules that are in BattleForce and fly with them. :)