WASHINGTON  The Federal Aviation Administration on Tuesday revoked the licenses of two Northwest Airlines pilots who flew 150 miles beyond their destination last week when they were distracted by a cockpit discussion of airline policy.

The men have 10 days to appeal, the agency said.

The F.A.A. took unusually swift action against the two pilots, Capt. Timothy B. Cheney and First Officer Richard I. Cole.

In its emergency order revoking the licenses, the F.A.A. said the crew had been out of radio contact for 91 minutes and flown 150 miles past the intended destination. The agency cited “failing to comply with air traffic control instructions and clearances and operating carelessly and recklessly.”

The order said: “You operated Northwest 188 in a reckless manner that endangered the lives and property of others. You engaged in conduct that put your passengers and your crew in serious jeopardy. You have demonstrated your lack of regard for or inability to adhere to your responsibilities to exercise the highest standard of care, judgment, skill and responsibility.”