Originally Posted by
Capt Kremin
The data shows a 63 second ground roll followed by a rotation at 207 knots. At this point the MCAS may have simply been doing its job.
The FR24 data do NOT show that.
After about 45" roll (05:38:45.798) and for 5 seconds the ground speed is stable at 182/183 kts while the vertical speed is positive, reaching 2368 ft/mn. Though the pressure altitude is not consistent with the speed and vspeed evolution, speed and vspeed indicates the aircraft is already airborne and climbing at 182 kts (about 170 kts IAS). And one minute later it has gained 1000 ft and speed (250 kts). Then only the problems begin, may be after retracting the flaps.