US officials have examined "black boxes" from the Asiana Airlines Boeing 777 flight that burst into flames upon landing in San Francisco, killing two teenage Chinese students.
There was no immediate indication of the cause of Saturday's accident but Asiana said mechanical failure did not appear to be a factor.
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Friday will be a much calmer day for many, with the weather set to remain dryer with sunny periods and much lighter winds than on Thursday.
Teachers and managers in particularly are putting in hundreds of hours of overtime free of charge.
Labour have lost the Copeland by-election, a seat they had held since 1983, as the Conservatives edged the vote by 2,000 votes.