The ill-fated plane was en route to Singapore from the Indonesian city of Surabaya on December 28 last year when it crashed into the Java Sea, killing all 162 people on board.
The plane's flight control computer had a cracked solder joint that kept malfunctioning. Aircraft maintenance records found it had malfunctioned 23 times in the year before the crash, and the interval of those became shorter in the three months prior to the crash.
"Subsequent flight crew action resulted in inability to control the aircraft... causing the aircraft to depart from the normal flight envelope and enter a prolonged stall condition that was beyond the capability of the flight crew to recover," Indonesia's National Transport Safety Committee said in a report.
In other words, "it's a series of technical failures but it's the pilot response that leads to the plane crashing," CNN's aviation correspondent Richard Quest said.
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