Just wanted to pick some CFI brains... I have a student that I’m finishing up who is near being able to take a checkride. One thing I noticed when auditing his logbook is the fact that he has around 10 solo hours logged at night. No big deal with a proper endorsement these days, but... Was this suck endorsement required that long ago? Otherwise this wouldn’t be “valid” time that we can use as logged correct? Any thoughts?