A Qantas flight bound for Perth experienced a major disruption when smoke was detected in the cockpit shortly after take-off from Sydney. The Boeing 737 was forced to make an emergency landing back in Sydney, where it was met by emergency services. Passengers reported a smell in the cabin and were informed of the smoke and fumes upon landing, causing concern. The incident is considered a matter of concern given recent mechanical issues and emergency landings involving Qantas. Despite the disruption, passengers were awaiting a replacement flight to Perth. The event occurred shortly after Qantas announced upgrades to its domestic fleet and reported a substantial profit.