Air Canada enRoute
Music to a pilot’s ear
There are all sorts of sounds that emanate from a plane, and when you fly frequently, you begin to hear them as a kind of symphony (or perhaps cacophony). The harmonic buzzing noise resonating from the narrow-body Airbus engines during takeoff; the whirring of hydraulic jacks when extending or retracting the flaps on the trailing edge of the wing; the barking dog sound from the hydraulic pump in the Airbus fleet during taxi; or the hissing that comes from the APU (Auxiliary Power Unit) in the tail that supplies conditioned air and ground power. And, of course, the staccato of seatbelts simultaneously unclicking once you’ve arrived at your destination. It’s all part of the aviation orchestra.