According to the NTSB, the two Northwest pilots who overshot their landing by 150 miles were using their laptops and lost track of time. You may be wondering – how could that happen?

In this AM original we're taking you inside the cockpit with the help of a flight simulator to see just what pilots deal with in-flight.

Read more: Report: Stray jet's pilots were on laptops

Washington (CNN) – Federal investigators have interviewed the pilots of a Northwest Airlines flight that overshot the airport in Minneapolis, Minnesota, last week, a National Transportation Safety Board spokesman said on Sunday.

The NTSB also said that flight attendants might be interviewed on Monday, and that it would not release further information for now.

Northwest Flight 188, carrying 144 people and five crew members, flew past Minneapolis-St. Paul International Airport during a mysterious 78 minutes of radio silence beginning about 7:56 p.m. ET Wednesday while en route from San Diego, California.

The Airbus 320 was over the Denver, Colorado, area when the radio silence began. Air traffic controllers re-established radio contact after the plane had flown about 150 miles past its destination.

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Air safety investigators are studying voice and flight data recorders to find out whether the crew of Northwest Airlines Flight 188 was asleep at the controls. Air traffic controllers could not contact the flight crew for more than an hour yesterday, triggering fears of a possible hijacking.

Peter Goelz, former managing director for the National Transportation Safety Board, says the pilots are facing a serious disciplinary situation. He spoke to John Roberts on CNN’s “American Morning” Friday. Below is an edited transcript of that the interview.

John Roberts: Peter, I know there are a lot of details yet to come out about this. What's your initial reaction to what happened? What are you thinking here?

Peter Goelz: Well, this is really disturbing. The pilots are saying they were engaged in a heated discussion, and that that distracted them. And there are indications, also, that the NTSB is going to look at whether these guys were simply asleep. But in any case, they certainly were not doing their jobs.

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By Mike M. Ahlers
CNN

WASHINGTON (CNN) - A passenger flight from San Diego, California, to Minneapolis, Minnesota, overshot its destination airport by about 150 miles Wednesday, and federal investigators are looking into whether the pilots had become distracted, as they claimed, or perhaps fallen asleep.

An aerial view shows downtown Minneapolis.

Air traffic controllers lost radio communication with the Northwest Airlines Airbus A320, carrying 147 passengers and an unknown number of crew, when it was flying at 37,000 feet, according to the National Transportation Safety Board. There was no communication with Flight 188 for more than an hour as it approached the airport, the board said.

When air traffic controllers finally made contact with the pilot, his answers were so vague that controllers feared the plane might have been hijacked, according to a source familiar with the incident.

The controllers in Minneapolis ordered the pilot to make a series of unnecessary maneuvers to convince them the pilots were in control of the flight, the source said, adding that fighter jets were poised in Madison, Wisconsin, but were never deployed.

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ATLANTA, Georgia (CNN) - The Federal Aviation Administration is investigating how an international flight into Atlanta's major airport landed on a taxiway instead of a runway early Monday.

The pilots of the plane that landed at the Atlanta airport have been relieved from flying duties pending probes.

FAA spokeswoman Kathleen Bergen said Delta Flight 60, from Rio de Janeiro, Brazil, to Atlanta's Hartsfield-Jackson International Airport, was cleared to land about 6:05 a.m. Monday on Runway 27R but landed instead on Taxiway M, which runs parallel to the runway. The flight had 194 passengers and crew aboard, according to CNN affiliate WXIA.

No other aircraft were on the taxiway, and there was no damage to either the taxiway or the plane, a Boeing 767, Bergen said.

A runway or taxiway collision, particularly with one plane preparing to take off and carrying a full fuel load, would be catastrophic.

Bergen said she isn't sure whether or when other aircraft have ever landed on the taxiway at Hartsfield.

Both Runway 27R and Taxiway M are 11,890 feet long, Bergen said, but the runway is marked with white lights while the taxiway is marked with blue lights.

Delta spokesman Anthony Black said the airline is cooperating with the FAA and the National Transportation Safety Board in their investigation, as well as conducting an internal investigation. The pilots of the flight have been relieved from active flying pending the completion of these investigations, Black said.

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Terry Williams hugs her two boys - Jake, left, and Zack - in 2006, before she says toxic cabin air made her sick.

(CNN) – Inside a freezer in a research laboratory at the University of Washington are blood and blood plasma samples from 92 people who suffer from mysterious illnesses, including tremors, memory loss and severe migraine headaches.

They are mostly pilots and flight attendants who suspect they've been poisoned in their workplace - on board the aircraft they fly.

Clement Furlong, University of Washington professor of medicine and genome sciences, leads a team of scientists who have been collecting the samples for 2 ½ years.

Furlong said his team is a few months away from finalizing a blood analysis test that will be able to definitely confirm whether the study participants were indeed poisoned by toxic fumes.

Results of Furlong's research could expand recognition of what a select group of researchers believes is a largely unrecognized risk of flying: the chance that poisonous fumes enter the cabin.

"There's a danger of inhaling compounds that are coming out of the engine," said Furlong in his laboratory.

The air we breathe on board a plane is a 50-50 mix of filtered, recirculated air and so-called "bleed air" - which bleeds off the engines, and then is pressurized and cooled before being sent into the cabin through vents. If an engine oil seal leaks, aviation engineers and scientists say, the bleed air can become contaminated with toxins.

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By Allan Chernoff
CNN Sr. Correspondent

A federal investigation into Federal Aviation Administration employee whistle-blower safety complaints has found more than two dozen to be on the mark, CNN has learned, potentially putting the public's safety at risk.

The federal Office of Special Counsel, which investigates allegations of reprisal against whistle-blowers, tells CNN it has made a "positive determination" that the FAA improperly responded to 27 current cases of FAA employee whistle-blowers warning of safety violations ranging from airline maintenance concerns to runway and air traffic control issues.

"It means that FAA is a very sick agency," said Tom Devine, legal director of the non-profit Government Accountability Project. "There's never been an agency that's had that large of a surge of whistle-blowers whose concerns were vindicated by the government's official whistle-blower protection office."

The Department of Transportation told CNN, "We acknowledge it's a large number of cases."

"We take whistle-blower complaints very seriously and we fully cooperate with all of the investigations," said FAA spokesperson Laura J. Brown.

Among the warnings found to have merit are those of FAA inspector Christopher Monteleon, who flagged safety problems at Colgan Air for several years before a Colgan plane crashed near Buffalo in February killing 50 people. He told CNN he's faced retaliation at the FAA for pointing out issues including faulty aircraft manuals and poor cockpit procedures he observed during in-flight aircraft testing.

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FAA inspector Christopher Monteleon says the agency put business interests above safety.

By Laura Dolan and Allan Chernoff

A Senate hearing this afternoon will examine the Federal Aviation Administration and its oversight of air carriers. Some FAA inspectors say the FAA is too "cozy" with the airlines.

We spoke with one inspector who noted problems at regional airline Colgan Air a full year before the tragic crash in February near Buffalo, New York, that killed 50 people.

Christopher Monteleon was in charge of overseeing Colgan Air's addition of a new aircraft to its fleet – the Bombardier Dash 8 Q-400 – the same model involved in the Buffalo crash.

Monteleon reported trouble during Colgan Air's testing of the new plane in January 2008.

"I observed from the cockpit operations all day long for the first day, and I observed unsafe practices. And I observed violations of the safety regulations. I observed pilots flying too fast for the design of the aircraft," said Monteleon.

In his report Monteleon noted 'the aircraft exceeded air speed limitation three times" and the pilots failed to note those violations so the plane could be properly inspected.

Excessive speed did not cause the February crash. The NTSB’s preliminary findings pointed to pilot error and mentioned pilot fatigue as a factor. But other problems Monteleon says he spotted at Colgan mirror issues uncovered in the Buffalo crash.

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David Hackett, President and CEO of Gulfstream International, denies allegations against the company.

By Allan Chernoff – CNN Sr. Correspondent

- Regional airline challenging FAA proposed fines
- FAA to monitor training programs

Gulfstream International Airlines' chief executive is denying allegations from current and former employees that the regional carrier has repeatedly violated safety rules in an effort to save money.

"Safety is our top priority," said David Hackett, President and Chief Executive Officer of Fort Lauderdale-based Gulfstream, which operates Continental Connection flights in Florida and the Bahamas.

Former and current Gulfstream employees have alleged to CNN that the airline has allowed maintenance issues to fester rather than properly repairing aircraft, and that pilots have been pressured to fly beyond Federal Aviation Administration limits designed to prevent pilot fatigue.

"There's nothing that would be acceptable about pressuring a pilot to fly an airplane he felt unsafe about," Hackett told CNN.

The FAA has proposed a $1.3 million fine against Gulfstream for alleged maintenance and scheduling violations, a move that Gulfstream is challenging. The FAA cited Gulfstream for repeatedly scheduling pilots and flight dispatchers to work past mandated limits. Gulfstream concedes there were discrepancies between pilot logbooks and the company's computer system that tracks hours, but only one actual duty time violation of a pilot accidentally being scheduled to work eight days in a row.

Former Gulfstream schedulers and pilots, however claimed to CNN, that dispatchers were pressured to 'shave pilot hours' from prior flights so pilot flight schedules would not exceed FAA limits, such as 8-hours within a 24-hour period.

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