As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT ON CLIMBOUT THROUGH 4000' EXPERIENCED SUDDEN LOSS OF POWER AND MADE A FORCED LANDING TO A HIGHWAY. INSPECTION REVEALED CRANKSHAFT BROKEN IN VICINITY OF MAIN BEARING JOURNAL JUST FORWARD OF CYLINDERS NR 1 & 2. METAL CONTAMINATION NOTED IN THE OIL SCREEN AND OIL SUMP. ENGINE ASSEMBLY FORWARDED TO MFG FOR FURTHER EXAMINATION.