, i.e. looking at the nut plates and bulkheads for cracks in the rear.
Cracks in the doubler / bulkhead where the leading edges of the horizontal and vertical stabilizers attach to the fuselage. Charles shows this on his website. With the exception the crack he shows is at the stabilizer attach points. We had multiple cracks on the corner radius's, (Radii? Radiai?

) That has been the main find in our 150. But, with our mechanic, not to traumatic to repair. But does involve removing the tail structures.