As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LIFTER BORES WERE ALL SLEEVED (ALL 12) NOTE: THE SLEEVES CAME LOOSE IN ALL THE HOLES (EXCEPT TWO) ROTATING AND BLOCKING OFF OIL PASSAGES. THERE WERE NO STANDARD SAFETY PINS, OR DEVICES TO HOLE THE LIFTER SLEEVE IN PLACE. THERE ARE MANY OTHER ENGINES IN SERVICE WITH THIS SAME REPAIR PRACTICE IN PLACE.