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Landing System Failure Unsolved at LAX

LOS ANGELES - Federal officials said Tuesday they do not know what is causing a critical instrument landing system to fail at Los Angeles International Airport.

The system, a beacon that guides planes to one of the airport's runways, has shut off twice within a week, most recently for about 40 minutes Monday. That created delays of up to 45 minutes as controllers kept planes circling.

"We haven't found the cause of the problem," said Steven Zaidman, the FAA's vice president for technical operations and air traffic operations. "At this point, we're maintaining technicians 24-7, full-time, to reservice the instrument landing system and reset it" whenever it shuts itself off.

The Federal ...

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