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Some trace of the passion that Zaharie Ahmad Shah had for flying can be found in the trail of e-mail exchanges and online message board posts that detail the Malaysia Airlines pilot's construction of a state-of-the-art flight simulator at home.
Now the stack of computer monitors, graphics cards and software he painstakingly sourced and improved is being pored over by investigators trying to make sense of the disappearance more than two weeks ago of the passenger jet he was piloting.
There is no evidence that Zaharie was responsible for the loss of Flight MH370, which had 227 passengers and 10 crew, including the 53-year-old captain, aboard.
In fact, many in the online community of specialist vendors and flying enthusiasts whom Zaharie turned to for components and advice say it is common for pilots to enjoy flying so much that they have simulators at home.
"Many pilots contact me interested in making 'home' simulators. Zaharie along with some others pilots actually used my motion controllers to upgrade the realism of their simulators by building motion platforms," Thanos Kontogiannis, a California-based aviation enthusiast who helped Zaharie build the simulator, posted on his blog on Monday.
Kontogiannis, whose LinkedIn profile and blog describe him as a San Diego-based Qualcomm employee who builds motion controllers in his spare time, did not respond to requests for comment.
But with investigators convinced that the missing plane was diverted thousands of miles off its scheduled course from Kuala Lumpur to Beijing by a skilled aviator, attention has focused on Zaharie and the 27-year-old co-pilot, Fariq Abdul Hamid.
Malaysian police seized the simulator last week from Zaharie's gated home in an upscale suburb west of Kuala Lumpur. Games he was running from the Microsoft "Flight Simulator" series and the latest "X-plane" title were being examined.
"Looking through the flight logs in these simulator games is a key part of the investigation," said an official with direct knowledge of the investigation into Zaherie and his co-pilot.
"X-plane 10 was interesting to investigators because it was the latest thing Zaharie bought. Also it is the most advanced out there and had all sorts of emergency and combat scenarios."
Malaysian investigators have asked the FBI for help in memory recovery after discovering some data was deleted on Feb. 3.
Zaharie spent thousands of hours in the virtual cockpit of the machine playing flying games or boosting its capabilities. He seemed proud of the results.
On the evening of Nov. 17, 2012, he