The FDR showed that the captain immediately applied back pressure on his sidestick to arrest the pitch-down movement. The aircraft’s flight control system did not initially respond to the captain’s sidestick input, but after about 2 seconds the aircraft responded normally and the captain commenced recovery to the assigned altitude. During this 2-second period the aircraft descended about 150 ft. Overall, the aircraft descended 690 ft over 23 seconds before returning to FL370.
Source: wiktionary
The sidesticks should be of the full length of the page, and abut against the headsticks on the outside of the form .
Source: wiktionary
Neither the sidestick nor the footstick should project beyond the other, as it will prevent the quoins from passing, and in unlocking will give a great deal of trouble.
Source: wiktionary
In using common footsticks and sidesticks, however, the broad part of the sidestick would be at the top left-hand corner of the left side section of the forme, and the broad part of the footstick at the lower right-hand corner.
Source: wiktionary