Reports suggesting it is the 777-200 model which would have two rolls royce trent engines and also reports that the Aircraft is around 14 years old. The 777-200 series is slightly shorter in length to the 777-300 model.
The 777-200 had issues in recent years with sudden loss of power to the engines, this happened in a number of cases that luckily enough were not fatal. The problem was supposedly sorted out. It was caused by ice building up in the fuel lines and limiting the flow of fuel to the engines.
There also has been a number of incidents with 777s making emergency landings with electrical faults. The interesting thing about this flight is it went missing during mid flight, this is considered the safest part of the flight. Lets hope there is a positive outcome but it looks unlikely.
Apparently no distress calls or indications of a problem with the plane before it disappeared. It was at cruise at 35,000ft, which should have been at its safest point of the flight. Rumours of an emergency landing dismissed.
That's the nightmare combination in a way because it suggests something catastrophic and sudden occurred, so it won't be long before suggestions of terrorism start. Typically, even if a flight experienced a serious mechanical problem and crashed, you'd expect that something would have been heard over the airwaves from the cockpit, considering the altitude it was reportedly at.
Hmm, now the conference is on the guy said they are working to confirm if reports that the plane had landed are accurate... WTF... didn't the airport already dismiss the reports? How can you not be sure whether the plane landed or not???