00:00At about 10.37 Eastern Time, and all of these times will be Eastern Time,
00:05at about 10.37 Eastern Time, the aircraft departed Austin-Bergstrom International Airport
00:11en route to North Eleuthera, Bahamas, with nine people on board,
00:16two flight crew and seven passengers.
00:20After takeoff, the flight proceeded towards the destination
00:24while establishing contact with various ATC facilities along the route of flight.
00:31About 12.47 PM Eastern Time, the crew transmitted to ATC
00:36that they were encountering light, clear ice, which was manageable and also moderate turbulence.
00:44While in contact with Miami Air Route Traffic Center,
00:48the crew transmitted that they were at 35,000 feet with moderate turbulence
00:53with altitude deviations of about 700 feet.
00:58The crew reported the outside temperature was minus 47 Celsius, which is minus 53 Fahrenheit,
01:06and they were managing the ice but were in moderate turbulence.
01:11Very soon after, the crew transmitted,
01:14we are picking up precipitation, requesting to climb to 37,000 feet if able,
01:20which was approved by FAA Air Traffic Control.
01:25Less than 30 seconds later, a transmission from the airplane announced the descent,
01:30followed by a mayday call.
01:33About 12.48 Eastern, the airplane transmitted,
01:37we are in an overspeed condition, descending with the rest unintelligible.
01:43Subsequent communications described that the airplane was descending rapidly
01:47and gave an altitude call-out.
01:50Sadly, all aboard were lost.
01:55Our investigator in charge is with me here.
01:57His name is Timothy Monville.
01:59I'm going to invite Tim to speak about the structure and process of the investigation.
02:04Mr. Monville is a senior investigator at NTSB with nearly 40 years of experience,
02:10and he's leading a multidisciplinary team of experts.
02:14Tim?
02:14Mr. Chapman, thank you.
02:20So, as the NTSB investigator in charge,
02:23I arrived yesterday evening about 7 p.m.,
02:28immediately consulted with local law enforcement
02:30to identify the scope of the accident site
02:34as well as to identify outlying parts.
02:38From that initial interaction,
02:44I came up with an investigative plan
02:47to document the parks that are known
02:51away from the main impact site,
02:53and the investigative team for NTSB
02:57includes a drone pilot,
03:00a systems and structure specialist,
03:03recorder specialist,
03:04and specialist from transportation disaster assistance,
03:08IT,
03:09public affairs,
03:11media,
03:12and communications.
03:14Additional personnel assisting NTSB
03:17include the Federal Aviation Administration,
03:20representatives of the airframe manufacturer,
03:23Learjet Inc.,
03:24and possibly the operator of the aircraft.
03:29In addition to the NTSB specialists
03:33away from the site
03:34include weather experts
03:36and air traffic control experts.
03:38We've just begun our documentation.
03:41We have a lot of work to do on scene.
03:46This will be a several-day process,
03:49and the biggest obstacle
03:51that we're going to have
03:52is recovering the major wreckage
03:55from the impacted crater on the roadway.
03:57We've got our technology.
03:59We've got to be a very big one.
03:59We've got all the way to the airframe.
