A Qantas Airbus A330-200, registration VH-EBA performing flight QF-36 from Singapore (Singapore) to Melbourne,VI (Australia) with 240 people on board, had been enroute at FL330 over the Indian Ocean northwest of Austrlia when the crew descended the aircraft to FL310.
The aircraft continued across Australia at FL310 for about 45 minutes, then attempted a step climb to FL330 and shortly after descended to FL310 again. The aircraft continued towards Melbourne for about 3 hours, then the crew decided to divert to Adelaide,SA (Australia). The aircraft descended to FL300, reported they had pressurization problems. The aircraft entered a hold descending to 9000 feet and subsequently landed on Adelaide’s runway 05 about 100 minutes after leaving FL310.
The airline reported a technical issue stating it had not been a priority landing. The passengers were rebooked onto alternate flights to Melbourne.
The aircraft is still on the ground in Adelaide about 24 hours after landing.
