The Federal Aviation Administration's lax oversight allowed Southwest Airlines to put millions of passengers at risk, according to a new audit that adds to scrutiny of the US regulator.
The audit shows the FAA, already facing questions for its certification of the grounded Boeing 737 MAX, permitted domestic-focused Southwest to operate planes purchased from other carriers in an "unknown airworthiness state."
Southwest operated more than 150,000 flights that did not meet US standards, the FAA's inspector general said in the report released Tuesday.
--AFP, Washington
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