beginning its descent in preparation for landing at this point a crew member may announce that all peds must be turned off and safely stowed for the remainder of the flight any cellular device 14 detected to be turned u201c on u201d after this point will be reported by the system 10 and logged into the blacklisted cellular device file 32 by the control system 26 alternatively the crew member may announce that peds must be turned off and safely stowed for the remainder of the flight with exception that specific types of peds not stowed in overhead bins may be used during taxi to a gate at the airport cellular devices 14 that are not turned off within a short predetermined time interval for example one minute will thereafter be logged into the blacklisted cellular devices file 32 by the control system 20 operational points 60 62 and 64 represent the approach and landing phases of operation of the aircraft 12 during which all peds typically must be turned off at point 66 the aircraft 12 has landed and is beginning a taxi in operation to the gate at which de planing will occur at this point a crew member may announce that all carry.