What was found
LANDING GEAR AIR GROUND FAIL ON ROTATION (TAKE OFF). DURING JACKING NLG STRUT FAILED TO FULLY EXTEND AUTOMATICALLY AND L PROXIMITY SWITCH FAILED TO ENGAGE. 1 NEW OCCURRENCE OF "LG AIR/GRD-PROX SW FAIL" NOTED ON CMC. CLEANED ALL LG LEGS AND SERVICES NLG STRUTS. RE-PERFORMED AC JACKING AND NOTED NO NEW "PROX SW FAIL" MESSAGES ON CMC WITH NLG SUCCESSFULLY EXTENDING. "LG AIR/GRN FAIL" MESSAGE PRESENT ON EICAS AFTER JACKING. PERFORMED ACT JACKING. PERFORMED EXTENSION AND RETRACTION SYSTEM OPERATIONAL CHECK. NO NEW DEFECTS NOTED AT THIS TIME ON EICAS OR CMC.