What was found
ON LANDING WHEN GEAR SELECTED DOWN, INDICATION WERE ON BOTH MAINS WERE DOWN & LOCKED, GREEN, NLG RED, UNLOCKED, NO GREEN. UPPER PANEL INDICATIONS WERE SAME. GREEN LOW AIR PRESSURE LIGHT CAME ON GREEN HYD SYS. RAISED GEAR & LOWERED GEAR AGAIN & NLG SHOWED RED AGAIN. WENT AROUND & IN GO AROUND NLG & ALL INDICATIONS WENT GREEN. LT GEAR DOWN & TRIED ANOTHER APPROACH. BITE CHECKED PROXIMITY ELECTRONIC UNIT PER AMM 32-31-71-04-0. FOUND FAULT CODE 63 PER TSM 32-61-00. R & R PROX DETECTOR PROCESSING UNIT PER AMM 32-31-71-04-0. JACKED NLG PER AMM 11-00-00-07. PERFORMED ADJUSTMENT & TEST AS PER AMM 32-31-00-5 CYCLED GEAR SEVERAL TIMES; OPS CHECKED NORMAL. PER MOCC LUBE NLG PER AMM 12-22-32-00. VERIFIED OPERATING TIMES OF NLG EXTENSION & RETRACTION ARE WITHIN LIMITS PER AMM 32-31-00-05 ON BOTH SYSTEMS 1 & 2. PERFORMED FREE FALL EXTENSION ADJUSTMENT & TEST PER AMM 32-33-00-05. OPS CHECKED GOOD.