Toronto ? The Air France jet that skidded off the runway and burst into flames earlier this week landed farther down the runway than it should have, but it is too soon to know if that was the reason for the crash, aviation investigators said Friday.

All 309 people on board escaped with their lives after Flight 358 from Paris crashed at Toronto’s Lester B. Pearson International Airport on Tuesday afternoon. The flight data and voice recorders were recovered the next day.

Real Levasseur, chief of the Transportation Safety Board team investigating the craft, said officials in France who have been downloading data from the cockpit voice recorders – the so-called black boxes – announced Friday most of the indicators from the boxes appeared intact and were not destroyed in the fire.

Levasseur said the captain of Flight 358 remained hospitalized Friday, but that all interviews with the co-pilot – whom Air France said was at the controls during Tuesday’s landing – and cabin crew were complete.