What was found
MLG DOOR EICAS MESSAGE ON FINAL, BIT PSEU BOX - NO FAULTS (000). DIALED IN CODE 505. STAUS PAGE SHOWS NO MSG'S. IAW FIM 32-09 FAULT TREE 804. DEBREIFED CREW, WHEN CAPT APPLIED FLAPS DOWN GOT GEAR DOOR EICAS MSG. DID A GO AROUND TO CONFIRM GEARS WERE DOWN. RIGHT BEFORE TOUCHDOWN, MSG CLEARED. OBSERVERED ALL GEAR DOORS CLOSED DURING TAXI. RT MLG ACTUATOR WAS REPLACED IAW FIM 32-30 FAULT TREE 802, RT MLG DOOR ACTUATOR OUT OF RIG IAW AMM TASK 32-12-00-825-113. AFT OTBD EDGE OF DOOR OVERFAIRED OVER .5 IN.. MAX MISMATCH IS .2 IN. DOOR IS NOT AGAINST THE STOP. FOUND RT MLG DOOR PROX SENSOR S10241 DAMAGED. FOUND RT DOOR ACTUATOR SHOWING 2 THREADS LONGER AS COMPARED TO LT DOOR ACTUATOR. DUE UNKNOWN NR OF THREADS OF REMOVED ACTUATOR IAW AMM 32-32-12-404-010. SUGGEST ADJUSTING TO SAME AS LT ACTUATOR & CHKD PROX SENSOR GAP & VERIFYING PSEU NEAR/FAR INDICATION. SHORTEN RT DOOR ACTUATOR ROD END BY 2 THREADS. GAPS CAME WITHIN LIMIT. IAW AMM 32-32-12-004-001, 32-12-00-825-113. PERFORMED GEAR SWING TO VERIFY DOOR ADJUST. OPS CHKD GOOD.