B747-400
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
Aircraft Aircraft Damaged; Flight Crew Overcame Equipment Problem; Flight Crew Executed Go Around / Missed Approach
Aircraft
While on Final Approach to runway; we received a Gear Disagree EICAS message. We were cleared for a right turn away from the Localizer at 2000 feet. Performed QRH procedure which included alternate gear extension. After all gear were down and locked we returned for a normal landing. Post flight inspection revealed damage to the left wing gear door with part of it missing.
During approach to land we received vectors to final approach and intercepted the localizer. On profile at glide slope alive I called 'gear down; flaps 20'. The captain selected gear down and flaps to 20 and we continued to glide slope intercept. I then called 'flaps 25; landing checklist' and no sooner than when I made that call we got two EICAS messages. The EICAS messages were 'Gear Disagree' and 'Gear Door' in addition to the messages we had an indication that our left wing gear was not down. We elected to leave the flaps at 20 and hold the landing checklist until our non-normal checklist was complete; at the same time maintained our current altitude and received clearance from tower for a right 360. I continued to fly the airplane while the captain and IROs ran the QRH procedure for 'Gear Disagree'. They followed the appropriate course of action in the QRH and got the left main landing gear down using alternate gear extension. At the end of the procedure the QRH called for a normal landing. We re-intercepted the localizer and I appropriately called 'flaps 25; landing checklist'. We landed uneventfully. During taxi; ground controlled called and asked if we had known if anything had fallen off the airplane they indicated that the local police was on the phone and a citizen had reported that something fell off the plane. We had no idea and continued to parking to find a portion of the landing gear door missing on the post flight walk around. The captain wrote up the maintenance discrepancies. At this point we do not have an exact idea of what mechanically caused the portion of the gear door to depart the aircraft.
B747 flight crew reported a 'Gear Disagree' EICAS message when the gear was selected down during approach and went around. The QRH was used to manually extend the left main gear. Post flight inspection revealed damage to the left main gear door.