Air Transat passengers had a scare on Sunday when the aircraft in which they were was a depressurization problem in flight, forcing them to put their oxygen masks. The incident occurred on the flight TS415 who liaised between Cancun and Montreal. The Boeing 737 took off from Mexico to 3:26 p.m. ET is 1:30 later, at 4:55 p.m., the unit has experienced problems.