Working on their laptops, pilots say

WASHINGTON — Not sleeping, the pilots say. They were engrossed in a complicated new crew-scheduling program on their laptop computers as their plane flew past its Minneapolis landing by 150 miles — a cockpit violation of airline policy that could cost them their licenses.

They were so focused on the scheduling — quite a complicated matter for the pilots after Delta Air Lines acquired Northwest Airlines a year ago — that they were out of communication with air traffic controllers and their airline for more than an hour. They didn't realize their mistake until contacted by a flight attendant about five minutes before the flight's scheduled landing last Wednesday night, the National Transportation Safety Board said Monday.

By then, Northwest Flight 188 with its 144 passengers and five crew members was over Wisconsin, at 37,000 feet.

The pilots — Richard Cole of Salem, Ore., the first officer, and Timothy Cheney of Gig Harbor, Wash., the captain — denied they had fallen asleep as aviation experts have suggested, the safety board said in recounting investigators' interviews with the men over the weekend.

Instead, Cole and Cheney said they both had their laptops out while the first officer, who had more experience with scheduling, instructed the captain on monthly flight crew scheduling.

A number of aviation experts — and people wondering about their next airline flights — have been suggesting it was more plausible that the pilots had fallen asleep during the San Diego-to-Minneapolis flight than that they had become so focused on a conversation that they lost awareness of their surroundings for such a lengthy period of time.

Air traffic controllers in Denver and Minneapolis repeatedly tried without success to raise the pilots by radio. Other pilots in the vicinity tried reaching the plane on other radio frequencies. Their airline tried contacting them using a radio text message that chimes.

Authorities became so alarmed that National Guard jets were readied for takeoff at two locations and the White House Situation Room alerted senior officials, who monitored the airliner as the Airbus A320 flew across a broad swath of the mid-continent out of contact with anyone on the ground.

"It's inexcusable," said former NTSB Chairman Jim Hall. "I feel sorry for the individuals involved, but this was certainly not an innocuous event — this was a significant breach of aviation safety and aviation security."