What was found
AFTER CONSULTATION WITH THE FLIGHT OPS DUTY OFFICER AND DETERMINING LNAV/VNAV SHOULD ENGAGE ON THE GROUND, LNAV/VNAV WILL NOT ENGAGE. LNAV/VNAV LIGHTS WERE VERIFIED OPERATIONAL. GROUNDED - YES. ACCOMPLISHED FMC BITE PER B737-800 AMM 34-61-801 TASK. NO FAULTS FOUND. ACCOMPLISHED DFCS BITE CHECK PER TASK 22-11-801 NO FAULTS FOUND. ENGAGED VNAV/LNAV WITH CURRENT FLT PLAN INFO . VNAV ENGAGED NO FAULTS NOTED.