I'm curious as to the legal status of the squawk sheets for airplanes
at flight schools or FBOs. There has been some discussion as to who
is "legal" to sign off on a return to service after a renter has
written a squawk. Some mechanics say instructors can do so.

My suspicion is that squawk sheets have no legal standing at all, and
any pilot can choose to fly a squawked airplane if he believes it
legal and safe to fly.

Anyone have information regarding this?