For more news & videos visit ☛http://english.ntdtv.com<br /><br />An incident on a Qantas domestic flight to Melbourne Tuesday... the plane suddenly dropped 26,000 feet mid-air. The sudden drop in pressure inside the cabin caused the oxygen masks to release. This is the latest in a series of mishaps on Australia's national carrier.<br /><br />A Qantas airplane encountered a mechanical fault mid-flight on Tuesday, forcing pilots to rapidly descend after the cabin depressurized.<br /><br />Masks were released from above the passengers as the Boeing 737 airliner descended to 10,000 feet.<br /><br />The actual cause is not yet known, but a possible air-conditioning fault could have been the reason, according to a Qantas spokesperson.<br /><br />The incident caused concern among the 99 passengers aboard the Melbourne-bound flight.<br /><br />[Julie Chau, Passenger]:<br />"It was like, this is like a movie scene or something, yeah and I thought we were really unsafe. I didn't know what was happening."<br /><br />[Liza Vallely, Passenger]:<br />There was a bang and there was a bit of a really muffled sound. Next thing we know, turbulence and the air masks dropped down and no one knew whether to grab them or whether it was a mistake and then we just hear this sort of pre-recorded voice saying "Emergency, emergency, please sit in the closest vacant seat and fasten your seat belts."<br /><br />No one was injured and the plane landed safely at Melbourne Airport.<br /><br />In November last year, Qantas grounded its entire A380 fleet after a Rolls-Royce engine exploded on a flight shortly after taking off from Singapore.