If I'm understanding everything correctly I don't think the following resolution will work. Maybe the answer is straightforward by my mind is boggled atm.
Scenario 1 - I'm planning a 'green' maneuver with a ship with Pattern analyser and PTL. The idea is to use the PTL 'double' action without ending up with a stress token.
During my turn I decide to change my mind and use Inertial dampeners instead. Since this will result in a 'white maneuver' I end up with a stress token which means I can't use PTL eventhough I have Pattern analyser to use.
Scenario 2 - I'm plannig for a 'green' maneuver on a stressed ship but during the activation phase I decide to use my inertial dampeners. I think I end up with 2 stress tokens on my ship.
When I read the rulesbook ships recover from stress by executing a 'green' maneuver (i.e. when I move and place my ship at the end of the 'green' maneuver template).
Intertial dampeners replaces the 'green' with a 'white' maneuver so will not clear the stress and let me receive another stress instead.