Qantas problems continue.

A pilot of a Qantas 747 flight was forced to turn back to Sydney today (15/11/10) during a flight from Sydney to Buenos Aires, Argentina, The pilot reportedly told passengers there was smoke coming from the instrument panel in the cockpit.

On Friday, a Qantas Boeing 767 turned back on a domestic flight in Australia after pilots detected abnormal vibrations in one of the plane's two General Electric engines. A week earlier, a Sydney-bound Qantas Boeing 747 landed safely in Singapore after an engine caught fire minutes after takeoff.

Both 747 planes were fitted with Rolls-Royce RB211 engines.

The fault on the A380 two weeks ago was in the Rolls-Royce Trent 900 engine. Leaking oil caught fire in the motor of a four-engine Qantas A380, heating metal parts and causing the disintegration over Indonesia before the jetliner returned safely to Singapore. Chunks of flying metal damaged vital systems in the wing of the Sydney-bound plane, causing the pilots to lose control of the second engine and half of the brake flaps on the damaged wing in a situation far more serious than originally portrayed by the airline.

Qantas grounded its six A380s within hours and said four days later that the checks had revealed suspicious oil leaks on three engines on three different grounded A380s. Singapore Airlines and Lufthansa, which both use A380s with Trent 900 engines, have conducted checks on their superjumbos and all but one have returned to service, the airlines say.