e) an annual examination of the recorded signal on the CVR shall be carried out by replay of the CVR recording. While
installed in the aircraft, the CVR shall record test signals from each aircraft source and from relevant external sources
to ensure that all required signals meet intelligibility standards;
f) where practicable, during the annual examination, a sample of in-flight recordings of the CVR shall be examined for
evidence that the intelligibility of the signal is acceptable; and
g) an annual examination of the recorded images on the AIR shall be carried out by replay of the AIR recording. While
installed in the aircraft, the AIR shall record test images from each aircraft source and from relevant external sources
to ensure that all required images meet recording quality standards.
7.2 Annual inspections shall be carried out as follows: