The federal government cited the airport and the airlines and fined them more than $200,000.

The following is Team 4 investigator Paul Van Osdol's report:

The FAA periodically does undercover investigations and surveillance at airports.

Team 4 obtained an FAA database that documents more than 800 security violations at Pittsburgh International dating back to 1990.

That's an average of one every five days.

Security at Pittsburgh International has stepped up in the past week as airport officials and the FAA try to avoid any terrorist attacks.

But over the past decade, FAA inspectors have found dozens of holes in airport security.

Team 4 obtained a database showing hundreds of citations at the airport -- everything from weapons violations to unauthorized access at hangars.

US Airways was the top offender with 174 violations. Next is the airport itself with 90 violations, followed by TWA with 44.

The total amount of fines for all violators is $240,000.

Van Osdol asked airport director Kent George how much concern he had because a number of the violations involved FAA inspectors catching people violationg procedures.

"I'm glad the FAA was out here. I'm glad they were finding it," George said.

"In a lot of cases, those employees are no longer here because they wouldn't follow through, wouldn't go through the system."

George admits that one problem was a US Airways hangar where there were repeated citations for unauthorized access. In 1999, US Airways was fined $15,000 for security breaches at the hangar, the largest single security-related fine at the airport since 1990.

"There's a security gate at Hangar One that was bypassed on two separate occasions," George said. "The FAA said, 'If it happens again, we'll come down harder.' I understand it happened again. US Air now has a gate manned."

George said that security has improved markedly in the past few years -- especially in the past week.

George thinks that there will be violations in the future.

"You cannot run a facility this large, with 20 million passengers and 18,000 people who work here a day, without having violations," George said.

Even so, the airport authority said that there should be fewer violations in the future because they just spent $3.5 million on security upgrades.

Only one out of four citations resulted in a fine.

No one from the FAA returned Van Osdol's calls. Neither did anyone at US Airways.