This flight normally operates OAK-LAX-ABQ-AMA.
Yesterday, it looks like WN took on OKC pax (maybe the LAX-OKC or ABQ-OKC flight was cancelled) and flew the normal legs on 227, plus AMA-OKC for the OKC pax, and then OKC-AMA to reposition the aircraft.
all legs are registered as B733/J except the AMA-OKC leg, for which FA says it was operated as a B727/J.
I find this to be an implausible equipment change. Is this likely a typo in the flight plan?