The pair of CRJ1000s participating in the program’s flight-test program remained grounded last month as Bombardier engineers continued to work on a solution to the software “glitch” that led to a halt in flight testing last September. “The Bombardier
CRJ1000 team is entirely focused on the software glitch and additional testing of the rudder CBW (command by wire) system,” a Bombardier spokesman told AIN. “These activities are most efficiently performed on the ground.”

Although during the company’s third-quarter earnings call in December Bombardier Aerospace COO Guy Hachey said that flight testing would resume “shortly after Christmas,” the spokesman would not issue a new time frame estimate.