As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETAINER SNAP RING FOR BEARING ON SMALL DRIVE CHAIN SPROCKET FOR LT HORIZONTAL STAB MOTOR COMPLETELY POPPED OUT. REPLACED SMALL DRIVE CHAIN SPROCKET FOR LT HORIZONTAL STAB MOTOR & JACK SCREW WITH NEW ASSEMBLY. PERFORMED TENSION CHECK & SECURED HARDWARE IAW AMM 27-44-02-4.