As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ROCKER ARM SHAFT RETAINER CONTINENTAL P/N # 631996. FOUND CRACKED RETAINERS DURING ANNUAL INSPECTION WHILE PERFORMING VISUAL INSPECTION. ORDER REPLACEMENTS. OLD PARTS ARE CAST AND NEW STYLE REPLACEMENT WITH SAME PART NUMBER LOOKS TO BE BILLET.