Investigators with the Transportation Safety Board have finished studying the wreckage of an airplane that crashed on Davis Inlet's frozen harbour almost two weeks ago.

The crash of the Inter-Provincial Airways Twin Otter killed the co-pilot. The pilot is still in hospital.

Witnesses told investigators visibility at the time of the crash was limited by blowing snow. But Al Coomber of the Transportation Safety Board says it's not clear what role the weather played in the accident.

He has confirmed that the emergency locator transmitter didn't work when the plane crashed. The impact broke the transmitter case and separated it from the batteries. Coomber says that's likely the reason the equipment failed.

A preliminary report on the crash is due in three months.