What was found
LOUD THUMPING NOISE COMING FROM NOSE SECTION OF AIRCRAFT UNDERNIETH MAYBE IN THE NOSE CONE RADOM. GEAR WAS UP IN THE GEAR WELL."TRANSFERRED TO NRWC 856-LGA-03250"-C/A-SUSPECTED LH AND RH MLG UPLOCK BOXES TO BE FAULTY REMOVED AND REPLACED LH AND RH MLG UPLOCK BOXES IAW AMM 32-33-10. PERFORMED OPERATIONAL CHECK EXTENISON AND RETRACTION AS PER AMM 32-30-00 & FUNCTIONAL CHECK OF LDG EMERGENCY EXTENSION PER AMM 32-34-00. OPS CHECK GOOD. NO DEFECTS NOTED/NO LEAKS. UPLOCK BOX ASSY P/N 2309-2900-401 S/N 1315 RH