A Delta Air Lines flight last week was canceled after the flight crew mistakenly deployed an emergency slide before boarding.

According to Delta, Delta Flight 419 traveling from Seattle-Tacoma International Airport to Daniel K. Inouye International Airport in Honolulu, was canceled after crew members mistakenly deployed the Boeing 767’s emergency slide and the flight crew timed out before the aircraft could be repaired.

Delta Air Lines had to call off one of its flights out of Sea-Tact on Thursday after crew members accidentally deployed an emergency slide.