A second Qantas Airways Ltd. plane made an emergency landing at Singapore’s Changi airport with engine problems, the Australian flag carrier said Friday.

“Shortly after takeoff, the aircraft operating at QF6 from Singapore to Sydney experienced an issue of one of its engines. As a precautionary measure, the captain sought primary clearance to return to Singapore and the aircraft landed safely a short time later without incident,” Qantas said in a statement.

“It was a B747-400 aircraft. There were 412 passengers, three flight crew and 16 cabin crew. The issue will be investigated by Qantas engineers.”

The statement added that the jumbo jet was airborne for one hour and four minutes before returning to Changi.

It was the second incident in two days involving a Qantas plane.

On Thursday, a Qantas Airbus A380, the world’s biggest passenger plane, also bound for Sydney, had to return to Singapore after one of its four Rolls-Royce Group PLC Trent 900 engine caught fire.

According to Qantas’ Web site, its 747 jumbojets are powered by either Rolls Royce or General Electric Co.  engines.

Rolls-Royce wasn’t immediately available to comment. A spokesman for GE’s aviation division said the company hadn’t been notified that their engines were involved.