What was found
"GEAR DISAGREE WARNING MESSAGE APPEARED APPROX 5-10 SECONDS AFTER COMMANDED NOSE AND RT MLG INDICATED "RED" , LT MLG SHOWED "YELLOW". QRH COMPLIED WITH GEAR EXTENDED NORMALLY. C/W MX ACTION FOR MEL 32-20-01. INSTALLED NLG SAFETY AND BOTH MLG PNS IAW AMM 10-11-00-400-801 AND 802. UNABLE TO DUPLICATE CONDITION, FOUND NOSE AND LT MAIN UPLOCK PINS SEIZED, LUBED AND FREED UP LOCK PINS, RETRACTED AND EXTENDED GEAR 25 TIMES NO FAULTS FOUND IAW AMM 12-20-32 AMD MXC INPUT, REMOVED PLACARD. (K)