A person just about to solo in ASEL. She is a current ATP Rotorcraft-helo, but with no Airplane Category on any certificate. Regarding 14 CFR 61.87(p), the solo endorsement shouldn’t have a 90 day expiration, because technically she is not a student pilot. It would have no expiration, correct? I seem to remember back in the early 90s when getting my CFI initially the idea that “one is only a student pilot once in their career”.