While in a nose-up attitude, the airplane banked left to a "wings vertical" attitude, then pitched nose-down, entered an incipient spin
and disappeared from view.
Many accidents classified in the "stall/spin" category involve stall events in which the ball is not centered--which results in an aggressive roll and pitch down that may be an incipient spin
or a spiral.
A stall and incipient spin
are unlikely to have that groundspeed.
The AAIB concluded: "The aircraft stalled and entered an incipient spin
, probably following a partial loss of engine power - the cause of which could not be determined.
I had him recover using the standard NATOPS "idle/neutral" recovery during the incipient spin
It massively increases the message that the back end of the car is moving," says Harty, "to the extent that--if you let go of the steering wheel--the back of the car will very elegantly steer itself out of an incipient spin
Then, just before it went out of sight under the leading edge of the wing, I saw it flick over to port in what looked like an incipient spin
The result is too common: Without much warning, the airplane entered a cross-controlled stall and an incipient spin
This includes losing altitude, especially if an incipient spin
The lifting wing pushes the airplane rapidly and dramatically into a snap roll or an incipient spin
The falling leaf maneuver starts with a power-off stall in level flight and initiating an incipient spin
by holding back pressure and applying full rudder in one direction.
18 sums it up best: During the incipient spin
phase, "recoveries in those airplanes approved for intentional spins are usually rapid, and, in some airplanes, may occur merely by relaxing the pro-spin rudder and elevator deflections.