@machinbird
PIO
1 unintenditional YES
2 PF stears exact 180 deg out of phase
3 extension of the airplane’s operational usage into an area for which it was not intended, or following a failure, and is not the fault of the pilot
4 IMO .......software element upstream of a control effector.....???
5 divergent with time, after 2:10:07
6 number of cycles of oscillation ??? more than 5 ???
7 The most common frequency is in the range for pilot closed-loop control.... here it was 1/3Hz
8 1/3 Hz is not high frequency it was not "mild PIO"
9 roll ratchet...... >10 deg
10 Peak-to-peak angular rates are usually greater than ±10 degrees/sec, and control forces greater than ±10 lb, though rate limiting can attenuate the former and result in large increases in the latter.8 “Severe” PIO requires immediate changes to the airplane, and if it occurs in developmental testing the flight test program should be postponed or redirected until the corrections are made. YES we wait