Regional Express did not provide flight crew or ground crew recurrent training to review the hand signals required to communicate with each other, including those used in an emergency.
The additional notices and training should improve knowledge retention of the correct hand signals among flight and ground crews.
On 22 May 2022, Regional Express reported that the following action had been taken to address this safety issue.
In addition:
Regional Express developed a new hand signal to indicate an interrupted engine start which was included in face-to-face and computer-based training content.