The divers are expected to return to the Botomac River on Friday as part of the recovery and investigation after the air collided, killing 67 people in the bloody airline disasters in the United States in about a quarter of a century.
Investigators have already registered a cockpit and a flying registrar for the US Airways plane that collided with the army helicopter during the plane landing on Wednesday night at Ronald Reagan National Airport next to Washington, DC.
All the two planes were killed on the plane, where officials examined the actions of the military pilot as well as monitoring air traffic after the helicopter apparently flew to the path of the Bombardier CRJ700, which is run by the US Airways. Officials from the multiple agencies participating in the investigation on the case will not speculate on Thursday.
Defense Minister Beit Higseth said on Friday on Fox News that the authorities were still searching for a Black Hawk helicopter recorder in UH-60. Higseth said other factors in the accident, including helicopter and whether the crew is using night vision glasses, is still under investigation.
More than 40 bodies were withdrawn from water. The official was not allowed to discuss the details of the investigation and spoke on the condition that his identity was not disclosed.
The National Table of Definition collision between the 5342 US Airways flight and the Black Hawk helicopter in the US Army at Ronald Reagan Washington National Airport.
Air traffic monitors have been examined
The plane carried 60 passengers and four crew members, and three soldiers were on board the helicopter. One of the air traffic monitors was responsible for coordinating the movement of the stages of the coming and departing helicopters when the collision occurred, according to a report issued by the US Federal Aviation Department obtained by the Associated Press.
These duties are often divided between two people, but the airport usually collects roles at 9:30 pm, as soon as traffic begins to slow down. On Wednesday, the supervisor of the tower directed them to be combined earlier.
“The formation of the situation was not normal for today and the volume of traffic,” the report said.
Parking is combined regularly when controllers need to stay away from the separation console, or during the changes in the transformation or when the air traffic is slow, the person said, on the condition that his identity is not disclosed to discuss internal procedures.
The Federal Aviation Administration has long struggled with a lack of air traffic monitors.
The officials said that the circumstances of the flight were clear, as the plane arrived from Witchita, who was a flying official in the Supreme Army, said that the helicopter crew, a Black falcon, was “very experienced”, and he was familiar with crowded flight that takes place daily throughout the city .
“Both pilots had moved this road before, at night. This was not a new thing for either of them.” Cosiol said that the maximum helicopter allowed at the time was 60 meters.
It was not immediately clear whether this limit has exceeded.
It can challenge the airspace around the national Reagan even the most experienced pilots, regardless of the perfect extent to the circumstances. They must move in hundreds of other commercial aircraft, military aircraft and restricted areas around sensitive sites.
A little more than 24 hours before a deadly collision, a different regional plane was forced to circumvent a second chance to land in Reagan National after it was advised to the nearby military helicopter, according to flight tracking sites and control records.
Aviation experts say that the landing at the three main airports in Washington was a challenge for decades due to the high size of the flight, the limited air field and the presence of two areas.
Data recovery can be a long process
Investigations can take several months to crash, and experts warn that there are no similar investigations, with flying records unable to always provide full answers. Almost all accidents involve multiple factors.
There are two mandatory registrars in civil aviation: the CVR Voice recorder for experimental sounds or cockpit sounds, and a separate flying data recorder (FDR). Some devices combine both functions.
After connecting to the water, you must first dry it completely and clean the connections to ensure that the data does not erasage by mistake. The audio and data files are downloaded and copied.
The data itself means little in the beginning. It should be deciphered from raw files before converting them into graphic graphics and synchronous with other data, such as air traffic controls.
NTSB investigators registered the cockpit audio and airline registrar from the Bombardier CRJ700 Participation in the last air collision in the air in DCA. Register in NTSB laboratories for evaluation. pic.twitter.com/Ihypr
Laboratory experts sometimes use “spectral analysis”, a way to decode transit sounds or barely audio warnings.
She led a group of incidents in the nineties in which the registrants stopped working when she lost energy to NTSB to recommend enough backup energy to provide 10 minutes of additional registration.
On Wednesday’s crash was the bloodiest in the United States since November 12, 2001, when it criticized an American flight in a residential area in Bill Harbor, New York, after taking off from Kennedy Airport, killing all 260 people on board and five people On the ground.
The last major killer incident that included an American commercial airline in 2009 near Buffalo, New York on the DHC-8 Bombard DHC-8, along with one person on the ground, reached the total number of deaths to 50.
Experts often highlight that flying travel is greatly safe.
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