Pilots and air traffic controllers (ATCOs) perform lengthy and complex procedures in the course of their duties. An interruption breaks the thread of these procedures and can have undesirable consequences. Distractions can make it difficult for the pilot or ATCO to concentrate on the task in hand.
Types of Interruption
Interruption on the flight deck may result from causes within the aircraft, e.g. the occupant(s) of (the) flight deck supernumary crew seat (s), the activation of an caution or warning, the activation of a cabin crew call alert, unexpected information from ATC or the operating Company.
Interruption may also occur in the control room, e.g. due to a telephone call, a message from a colleague or detection of a potential airspace infringement or level bust.
Types of Distraction
Examples of circumstances where distraction may occur on the flight deck include non-relevant conversation, equipment malfunction and adverse weather.