Originally Posted by
rickair7777
There may be some gray area about logging (not acting) PIC in an airplane for which you have category and class ratings, but lack an endorsement.
There is no gray area about this at all. It's been clear as a bell for years.
While you may need the endorsement in order to log PIC, this endorsement is just like any other when it comes to logging PIC as sole manipulator under 61.51(e)(1)(i) - at least a recreational certificate with the appropriate category and class (and type if applicable) ratings. No other requirements. None. Zip.
Of course that's only the FAA. If you maintain your logbook for a bunch of employers who make up their own rules rather than follow the FAA's, you're on your own.