XIXI, Taiwan –  Investigators are examining wreckage and flight data recorders for clues into a plane crash on a Taiwanese island that killed 48 people.

Stormy weather and low visibility are suspected as factors in Wednesday’s crash of the twin propeller ATR-72 operated by TransAsia Airways.

Local media reported Friday that the plane’s cockpit voice recorder and flight data recorder had been sent to the main island of Taiwan for analysis.

Investigators searched for other clues at the crash site on the island of Penghu in the Taiwan Strait west of the capital Taipei. The airline’s chairman Vincent Lin visited grieving relatives gathered at a local funeral home and said the company would do all it could to aid them in their suffering.

Ten people survived the crash.