As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING BLEEDING OF LH HYDRAULIC SYSTEM, CLUNKING NOISE HEARD UNDER COCKPIT ENTRY WAY FLOOR WHEN OPERATING ELEVATORS THROUGH FULL RANGE OF TRAVEL. BUSHINGS FOR PILOT AFT LAT/LONG CONTROL MODULE ASSEMBLY FOUND MISSING. INSTALLED NEW BUSHINGS AND HARDWARE IAW G650 AMM 27-30-00. CYCLED ELEVATORS AND CLUNKING NOISE NO LONGER PRESENT.