As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AD 97-01-03 AND LYC SB 527B DO NOT REFERENCE VO540 ENGINES IN MODELS AFFECTED, BUT 4 OF 6 PISTON PINS IN ENGINE HAD TO BE REPLACED IN C/W THE SB REQUIRED ACTION. NOTE: 6-CYLINDER HELICOPTER ENGINES ARE LISTED IN WARRANTY LABOR ALLOWANCE AND A VO540 ENGINE IS LISTED IN MODEL AND S/N ATTACHMENT TO THE SB.