Sterile flight deck rule

Requirement limiting activity during key flight phases

In aviation, the sterile flight deck rule or sterile cockpit rule is a procedural requirement that during critical phases of flight, only activities required for the safe operation of the aircraft may be carried out by the flight crew, and all non-essential activities in the cockpit are forbidden. In the United States, the Federal Aviation Administration (FAA) imposed the rule in 1981, after reviewing a series of accidents that were caused by flight crews who were distracted from their flying duties by engaging in non-essential conversations and activities during critical parts of the flight.

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