Safe to Use Seat Stowed in Cabin?

[sraplayas]

My brother has offered us their infant seat to use for our baby due in 2 months. Everything checks out---no accidents, safely washed, up-to-date. However, they brought the seat with them on the airplane and an attendent stowed it in the cabin. So, is the seat still safe?

[DahliaRW]

I would not have an issue with it being stowed in the cabin.

[Maedze]

Wouldn't so much as blink. :-)

[McGucks]

Bring it on.  No worries.