I have a friend who was on a 737 from AMS to BEY a few months ago, and she was seated at a window seat. It must have been either a 734 or a 738.
She said that under the window, part of the plastic covering the fuselage was broken and there was a big chunk of ice (20cmx10cm).
Is that normal? Is there really some ice under the plastic that we don't see? Was there a problem?
Any help would be appreciated as she's so freaked out of KLM now!