China Eastern flight MU5735 from Kunming to Guangzhou plunged from cruising altitude into the mountains of Guangxi on March 21 in China's first fatal air crash since 2010.
hina said on Wednesday the black boxes of a Boeing BA.N 737-800 jet that crashed last month were badly damaged, leaving virtually no publicly available clues to explain its violent plunge into a wooded hillside, killing all 132 people on board.
China Eastern flight MU5735 from Kunming to Guangzhou plunged from cruising altitude into the mountains of Guangxi on March 21 in China's first fatal air crash since 2010.
Summarising its preliminary crash report, the Civil Aviation Administration of China (CAAC) did not include any information from the cockpit voice and data recorders, which had been sent to Washington for analysis.
"The two recorders on the plane were severely damaged due to the impact, and the data restoration and analysis work is still in progress," CAAC said in a statement.
CAAC gave no indication of the focus of its probe. Most accidents are caused by a mix of technical and human factors.
"There are many difficulties in investigating this accident, and at the moment the available evidence is limited," Li Yong, deputy director of CAAC's aviation safety office, said in an interview with state news agency Xinhua.
But the regulator ruled out a number of risks, saying the crew were qualified, the jet was properly maintained, the weather was fine and no dangerous goods were onboard.
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