Washington (CNN) — Federal aviation authorities are expected to suspend or revoke the licenses of the two Northwest Airline pilots involved in last week’s overflight of the Minneapolis-St. Paul airport, a federal official said.

The official said the action could come as early as Tuesday.

On Monday, the National Transportation Safety Board reported that the pilots — Capt. Timothy B. Cheney, 53, and First Officer Richard I. Cole, 54 — told investigators they used personal laptop computers during the flight, in violation of company policy, and lost track of time.

They became aware of their plane’s position only after a flight attendant asked about the landing time.