3 The National Transportation Safety Board says the two men were still buckled into their seats .. when a salvage crew recovered the wreckage near Brunswick. But the most significant revelation is that .. .. the Piper Seminole broke up mid-flight ... while en-route to Craig Airport here in Jacksonville. The crash was a week ago yesterday ..as the plane was starting to descend from 8000 feet in preparation for landing.... Searchers found multiple debris fields. Channel 4's Tarik Minor spoke with an aviation expert about these findings. He joins us LIVE from Craig. Tarik, the question now is what would make this plane break up while in the air? 3 3 3 The investigation into this plane crash could have big implications for hundreds of pilots in the state of Florida who fly the exact same Piper PA-44. If NTSB investigators find out that the plane broke apart in the air as the result of structural failure.Planes like this one could be grounded all together. 3 00-1022-2822:45:21"there would be no way to regain control under their circumstances."The pilot and passengers fates were sealed according to aviation experts when their aircraft broke apart in the air over this remote Brunswick marsh. A rare and alarming incident in a Piper PA-44 - one of the most popular planes for training pilots in the state.The FAA could take action. 22:43:14"they could require grounding of all of these kinds of airplanes for inspections, if it passes it could return to service, they could adjust the maximum life of the airplane that could ground some of the fleet, lets say 12,000 that would ground a lot of airplanes right now."Pilot Ed Booth says a critical question federal investigators will soon answer, is just how many miles the plane logged in the air. Most Piper PA-44's were built in 1970, and their service life shouldn't exceed 16,462 hours.Call #1 :36 " I could hear the plane going up, and then all of a sudden the engine died, and then I could see it going down and I heard a thud, as it apparently hit somewhere."What 911 callers heard on the ground was likely the pilot trying to regain control of the airplane which had just started it's descent according to aviation experts. And it's during the descent when aircrafts experiences the maximum amount of stress inflight.Call 2 - :23"I heard it sounded like it was backfiring, it almost sounded like an explosion."Booth says the noises heard on the ground are consistent with the sounds of an aircraft breaking apart in the overhead .. And because most Piper PA-44's are 35 years old, he expects federal investigators to move swiftly. 22:46:38"The fact that there are hundreds of these in daily service training service pilots makes it imperative that the FAA moves rapidly to determine if this was a fleet wide problem or an isolated incident." 3 The Piper PA-44 has a remarkable safety record, with only 24 recorded fatal accidents in 35 years of service. Two of those fatalities were suicides. What have you been able to find out about the safety record of this plane .. the Piper PA-44 Seminole?