System and method for inspecting an acoustic liner of an aircraft engine

A system for inspecting an acoustic liner in an aircraft engine, the acoustic liner positioned in an inner cavity of a component of the aircraft engine, the system comprising:

• a processing unit;
• and
• a non-transitory computer-readable memory communicatively coupled to the processing unit and comprising computer-readable program instructions executable by the processing unit for:
• emitting, through a section of the acoustic liner to be inspected, a sound signal having an initial intensity;
• capturing, via a sound capture device positioned inside the inner cavity, a transmitted intensity of the sound signal following its transmission through the section of the acoustic liner to be inspected;
• determining an loss in signal intensity through the section of the acoustic liner to be inspected by comparing the transmitted intensity to the initial intensity;
• and
• upon detecting that the loss in signal intensity is within a predetermined loss in signal intensity envelope for the acoustic liner, emitting an indication that the acoustic liner is acceptable.

A system for inspecting an acoustic liner mounted in a component of an aircraft engine, the acoustic liner formed at least partially of a porous material, the system comprising:

• a sound generating device positioned outside of the component, the sound generating device adapted to emit a sound signal having an initial intensity;
• a sound capturing device positioned inside the acoustic liner, the sound capturing device adapted to capture a transmitted intensity of the sound signal following its transmission through a section of the acoustic liner to be inspected;
• and
• a controller adapted to determine a loss in signal intensity through the section of the acoustic liner to be inspected by comparing the transmitted intensity to the initial intensity, and determine an acceptability of the acoustic liner by comparing the loss in signal intensity to a predetermined loss in signal intensity envelope for the acoustic liner.