As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) AT ENGINE BULK STRIP, FOLLOWING THE SEPARATION OF NR 2 CYLINDER HEAD (REFER MDR 98/0488), A 127 MM (5 INCH) LONG CRACK WAS FOUND IN THE CRANKCASE RUNNING FROM THE MATING FACE BACKBONE FLANGE DOWN TO THE NR 2 CYLINDER PAD. THE CRACK WAS OBSCURED BY THE LT MAGNETO AND HAD SILICON SEALANT SPREAD OVER ITS ENTIRE LENGTH.