What was found
DURING C-CHECK, HORIZONTAL STABILIZER BALL SCREW AND BALL NUT FAILED FREE PLAY CHECK. REMOVED STABILIZER DRIVE MECHANISM, CHECKED WEAR OF PINS AND FITTINGS, FOUND IN TOLERANCE IAW 747 MM 27-41-06. REINSTALLED DRIVE MECHANISM PER 747 MM 27-41-06 AND PERFORMED BALL NUT TO BALL SCREW FEE PLAY TEST IAW SB 747 27A2396, FOUND FREE PLAY LESS THAN 0.012, WITH-IN LIMITS, ACCOMPLISHED LUBRICATION OF BALL NUT AND JACKSCREW IAW 747 MM 12-21-19 AND S/B 747-272396