Jim

    After about 150 hours on my 360 I discovered that the rear bulkhead was cracked. This was caused by the spinner having too much play and I fixed this by adding a forward bulkhead.  I added it to the prop as a circular piece of aluminum bolted to the prop dome. Rather that spending lots of time getting a perfect fit I added tape around the outside of the aluminum disk till I had a tight fit.  200 hours later and no more cracks.  Something to be careful about in moving the aircraft on the ground is to not applying pressure to the spinner, use the prop close to the hub.

Jack Webb
L 360, L IV
FAA Designated 135 Check airman
ATP, CFI Airplanes & Instruments, Multi, & Sea
Many Jet Type Ratings
Experienced Experimental Test Pilot both multi and single engine
Former Chief Engineering Test Pilot for a Major Manufacturer
AeroSpace Engineer BSAE
Ohio