Alaska Airlines flight AS-322 had to make an emergency landing in San Jose, California, on January 12th.
The pilots declared an emergency after the crew noticed a white powder leaking from the cabin air conditioning vents and three of them reported feeling unwell. The Boeing 737-900 plane was flying from Seattle, Washington, at the time.
The plane landed safely. One crew member was taken to hospital while two others received treatment at the airport. All 181 passengers remained unharmed.
It is believed that the white substance was a de-icing agent.
An Indonesian military plane crashed into a mountain in Papua province of Indonesia, on December 18th.
American Airlines flight AA-2549 hit severe turbulence near Denver, Colorado, on December 10th.
Qatar Airways flight QR-708 had to make an emergency landing at Lajes Field, Portugal, after encountering severe turbulence on December 4th.
Air New Zealand flight NZ-268 had to return and make an emergency landing in Ho Chi Minh City, Vietnam, on October 9th.
Piedmont Airlines flight PDT-4839 had to return and make an emergency landing in Philadelphia, Pennsylvania, on September 27th.
Trigana Air Service flight IL-7321 made a hard landing at Wamena Airport, Papua, Indonesia, on September 13th.
A REACH Air Medical Services aircraft crashed in Humboldt County, North Coast, California, on July 29th.
Yamal Airlines flight YC-623 had to return and make an emergency landing at Domodedovo International Airport, Moscow, Russia, on June 27th.