CAIB says that after a preliminary review of the recorder, the board has learned that there are approximately 420 sensors with good data, with more to come. These sensors record mainly temperatures and pressures.
Earlist temperature rises were near RCC Panels 9 and 10 at 08:51:09. Data recovered from a recorder on board the shuttle show that abnormal heating began about a minute earlier than previously believed, slightly closer to the wingtip, according to the Columbia Accident Investigation Board.
Final contact with the shuttle was at 9:00:04 a.m., but data from the recorder continues until 9:04:18.
NASA estimates that the shuttle broke up 21 to 25 seconds after the hour.