Noise on push back but during flight
Hello,
I am just wondering about a nosie on a recent A320 flight.
I am used to the PTU noise (many A320 flights..) at startup on the push back etc...but, I heard this noise for over a minute several times yesterday on my flight back from Cancun. It was over a minute on the ground. Then heard it for short spurts during flight, then again for almost two minutes mid flight and then it was in spurts again on appraoch and then ran again fro 1-2 minutes after we got to the gate.
I have never heard so much from noise and wonder if we were in any danger or if something was not working, leaking or whatever?
I appreciate any responses as I have many more A320 flight scoming up.
Thanks
DGD