Sounds you don't want to hear in an airplane: THUNK

Dani here -

The hubby and I were flying back from having lunch in Concord. I was flying and was on base for 16 R when we heard a distinctive “THUNK” sound.

We looked at one another and my husband said, “What was that?” I replied, “I don’t know…” Then we noticed the low voltage indicator was on.

Turns out it was our alternator belt, it broke. Nothing that 0.75 aviation units didn’t fix. Thank goodness it was an easy fix.

What are sounds you’ve heard while flying that meant something expensive (or possibly life threatening) occurred?