In addition, the airplane's combined flight data recorder and cockpit voice recorder were also sent to the NTSB for analysis.
He said his family had wanted the inquiry to recommend that private aircraft should be fitted with a flight data recorder.
He said aviation authorities have already removed the plane's flight data recorder and are now planning to tow the aircraft to a beach.
She said the flight data recorder indicated "both engines lost power simultaneously" when the plane was at 3, 200 feet -- some 90 seconds after takeoff.
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The aircraft's voice recorder and flight data recorder were recovered from the ocean floor in May 2011 after an extensive search using miniature submersible vehicles.
The cockpit voice recorder and the flight data recorder of the ill-fated plane are yet to be recovered, Ria Novosti reported at 02:15 local time on Thursday.
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She said the flight data recorder indicated "both engines lost power simultaneously" when the plane was at 3, 200 feet some 90 seconds after taking off from New York's LaGuardia airport Thursday afternoon.
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As they listened to the audio, jurors also watched a computerized simulation of the plane's flight path based on a recovered flight data recorder as the events on the tape were unfolding.
The flight data recorder also could prove valuable because it would have recorded actions taken by the pilots during the 78 minutes they did not respond to repeated calls from air traffic controllers, the ex-investigator said.
The separate flight data recorder also could prove valuable because it would have recorded actions taken by the pilots during the 78 minutes they did not respond to repeated calls from air traffic controllers, the investigator said.
The separate flight data recorder also could prove valuable because it would have recorded actions taken by the pilots during the 78 minutes they did not respond to repeated calls from air traffic controllers, the former accident investigator said.
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Speaking about the January 7 fire in Boston, Hersman said the plane's flight data recorder showed the battery underwent an unexplained drop in voltage from 32 volts to 28 immediately before the incident, as the plane was being serviced on the tarmac.
"We are very pleased that the boxes have been found, and have lasted almost two years down at 12, 800 feet, which is well beyond the design life that they were established for, " John Bolton, from flight data recorder manufacturer Honeywell, told CNN at the Paris Air Show.
The flight's data recorder has been recovered and has been sent for analysis.
But on Sunday the National Transportation Safety Board completed its examination of flight recorder data from the jet that caught fire in Boston, and determined that the affected battery did not exceed its designed voltage.
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His team has begun analyzing data from the flight recorder -- also known as the "black box" -- that was recovered Tuesday.
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