The wording can be a little confusing, but there are only two kits. SK 152-24A and SK 152-25A.
The 150's that are affected by this AD have a sheet metal bulkhead, thereby requiring either the placard or the installation of SK 152-24A.
The early 152's with the sheet metal bulkhead require the same kit. The later model 152's with the forged bulkhead require either the placard or the installation of SK 152-25A.
There is only one kit applicable to the 150. SK 152-24A.
