It is only a graphic view about this share, my thought is that this aircraft is in the base line of downward channel and any moment the machine can put a bit of power to regain height.
Look the latest recovery flight (blue box), since 16 December 2015 for about 25%, 135 days flight stabilizer.
¿How many feet can regain in this new flight to the roof of the channel? Buy your roundtrip tickets and discover it.