Originally Posted by
Vessbot
He means that it was installed wrong, by the airline's mechanic, on the accident aircraft.
1. The values before establishing in forward flight is dependent on wind direction, the probe can be in random positions.
AOA probes stick, or go open or closed circuit, and give fixed, high or low limit output on failures. A constant difference between the two is not a fault in the sensor it is an indexing error, IMHO.
JT043 28 Oct 18 DPS-CGK first flight post installation of replacement AOA probe
JT610 28 Oct 18. Accident flight, post further maintenance action