I have been looking at various different versions of Passai / Bassai kata and the versions we practice in Matsumura seito are a bit different. When I originally learned these my instructor did not teach any bunkai. Since then I have been studying them and there are several parts that I don't have great answers for.
a. The second section in the kata where you step back into passai dachi and bring both arms up like a type of cover and then shuto down and nukite under it. you then turn and repeat.
b. Later in the kata and this shows in both sho and dai versions is the three stepping gedan barai and then step back into a "crane style" posture and mae geri.
c. The three double punches each time stepping back into an attention stance.
I'll stop there and add Passai Dai questions later. Any thoughts on these would be great.