Strange Noises heard on various aircraft - What are they?
Just flown (as SLF) A320 out and A319 back from Frankfurt.On both flights, immediately after engine shut down there was a load noise that I can only describe as a giant trying to rub a stubborn stain off the tail of the aircraft with an enormous chamois leather! It went on for quite a while gradualy getting slower as though the said giant was becoming exhausted. I fly quite a bit but this sound is something I cannot place. Explanation from those that know much appreciated.