De-icing of propellers and wings often results in ice being slung
against the fuselage resulting in loud bangs. Pretty disconcerting if
you don't know what it is.

John

On 7/31/2012 10:14 AM, Hector Zapata wrote:
> Very enlightening, thank you. That might explain the loud noise I
> heard while flying from PR to Savannah, Ga. in a C-130 (8 hour flight,
> no movies), de-icing using exhaust heat. That was loud and unexpected.
>
> Hector
>
>