Correct.
From the manual:
"Note: Whenever you fly, your aircraft resources will
be slowly consumed (fluids, working resources,
stress applied etc). Once you land and require
refueling, the systems will “self repair” after the
refueling is done."
"Note: Internal systems “self repair” is coupled with
refueling. However, to make repairs of damaged
hardware (fuselage, wings, tail, gears) you need to
call the ground crew and ask for repairs. The same
applies for rearming."
"Your engine will reset stress level to zero, once you
land and shut it down. This will happen along with
aircraft systems self repair event. You don’t need to
do anything apart from being patient for max. 4
minutes."