|Buoyancy bags will be attached by lines to the sunken fuselage of the AirAsia aircraft|
The head of Indonesia's transportation safety committee, Tatang Kurniadi, suggested a preliminary report on the crash is expected to be filed with the International Civil Aviation Organisation next week. Transport Minister Ignasius Jonan revealed that radar images had plotted the jet in a steep climb and far too fast - at a rate of 6,000ft (1,828m) a minute.
He said: "It is not normal to climb like that. Commercial planes, which normally climb just 1,000 to 2,000 feet per minute. It [higher rates of climb] can only be done by a fighter jet."
The jet took off from Surabaya at 05:35 local time (22:35 GMT 27 December).
Shortly before it vanished, nearly halfway into the two-hour flight, its pilot contacted air traffic control to request permission to climb to 38,000ft from 32,000ft to avoid big storm clouds - a common occurrence in the area. Permission was refused.
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