WASHINGTON (BLOOMBERG) - Pakistan's national airline has been barred from flying to the US as a result of a scandal in which almost one-third of the nation's pilots were found to have faked certifications.

The US Transportation Department notified Pakistan International Airlines Corp's lawyers in Washington on July 1 that its authorisation to operate to US destinations was being immediately suspended.

The department released a copy of the letter on Thursday (July 9).

PIA has been wracked by years of financial losses and on May 22 suffered a fatal crash in which 98 people died after pilots attempted to touchdown without lowering the landing gear, damaging the engines.

The flight crew tried to lift off again, but the engines failed a short time later.

The Federal Aviation Administration had notified the department on June 30 that all of PIA's operations to the US should be terminated as a result of the pilot-certification scandal.

The European Union Aviation Safety Agency on June 30 blocked PIA and charter operator Vision Air International from flights to the European Union.