What was found
DOORS LIGHT ILUMINATED WITH LANDING GEAR DOWN, NOSE GEAR LIGHT ILLUMINATED ON S/O PANEL. FLIGHT-GO-AROUND, RAN QRH LANDED UNEVENTFULLY. OBSERVED NG DOORS DROPPING 1 INCH, FOUND EXCESSIVE AMOUNT OF RUBBER BUILD UP ON FWD EDGE OF BOTH NG FWD FRAMES, CAUSING BOTH DOORS TO BIND WHEN CLOSING. CLEANED BOTH LEADING EDGES OF NG DOOR FWD FRAMES THAT CONTACT WITH NOSE GEAR WHEEL WELL FWD SEAL. CLEANED RUBBER BUILDUP FROM SEAL LUBED SEAL WITH SILICONE AND FRAMES WITH GREASE. TEST GOOD WITH MANUAL OPERATION. REF AMM 32-33-051-4 NSP.