What was found
RETURN TO FIELD LOUD BANGING IN N.L.G BAY. L/H MLG CYCLING. -CREW REPORTED L/H HYD PRESSURE CYCLING WITH GEAR. MAINTENANCE REMOVED AND REPLACED LH MAIN LANDING GEAR UPLOCK BOX IAW EMB AMM 32-33-10. OPERATIONAL/LEAK TEST SATISFACTORY. OK FOR SERVICE. AIRCRAFT RELEASED FOREVALUATION FLIGHT DUE TO: RTF FOR LOUD BANGING IN NOSE BAY. LH GEAR CYCLING REF LP 215204/2 MAINTENANCE ACTION COMPLETE SUBJECT TO SATISFATORY EVALUATION FLIGHT. CREW: EVAL FLIGHT IS SATISFACTORY.