Observations
(1)
The data show that the great majority of calls follow the
instruction-readback-confirmation procedure perfectly. This is good news for
airline passengers! About 90% of calls were correct.
(2)
Of the calls that didn’t follow the procedure perfectly,
the majority are “say again”. This is also good news because it ensures that
the pilots understand the instructions.
(3)
Only 2% of the readbacks were incorrect.
(4)
Only 1 % of the calls were missed.
(5)
The percentage of correct calls didn’t vary by much for
the different types of flight. The highest percentage correct
were by Canadian airlines (92%) and the lowest was the
(6)
The percentage of missed calls, incorrect calls, and “say
agains” also didn’t vary by much because all of these numbers were low.