KUALA LAMPUR, Malaysia - As the disappearance of Malaysia Airlines Flight 370 enters its sixth week, investigators are scrutinizing the pilot's social media activities.

A distinct image of Captain Zaharie Ahmed Shash has emerged from his Facebook account. Friends told investigators his passion was working with gadgets and electronics. His Facebook page features a 16-minute video he made about how to optimize an air conditioner to reduce electricity bills.

Until about a year ago, he posted a lot about politics, urging people to vote out the current government. In one post, he wrote, "50 years in power by a single party does not say much about democracy in the country."

Despite the political posts on his Facebook, investigators say nothing on his social media accounts appears to be suspicious.

The search for the missing jet continues in the Indian Ocean.