Finally! Now We Know What These 11 Mysterious Flight Codes Really Mean, According to a Pilot

“Cabin crew, doors to arrival and crosscheck”

You’ll hear this from the pilots or the senior purser (head flight attendant), says Dan Boland, an international airline pilot based in Hong Kong. (Make sure you don’t make any of these 16 common mistakes on your next flight.) Boland, who also works for the discount coupon travel site HolidayPromoCode.com, explains that it’s a reminder to the cabin crew to deactivate the emergency exit doors on the plane. Otherwise, the emergency slide chutes will inflate when the doors are opened at the gate. “The word crosscheck means to back each other by checking the opposite crew members’ door as a double check. There have been some dangerous incidents around the world,” Boland goes on to say, “where cabin crew forgot to disarm the doors and the slides inflated and crushed the ground crew waiting inside the jet bridge. When we push back from the gate for departure the crew will do the opposite and arm the slides on the doors so that if we need to evacuate the slides will automatically inflate.”