Date: 201210
Local time of day: 0601-1200
Location: ZZZZ.Airport, FO
Light: Daylight
Aircraft: B767-300 and 300 ER
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Final Approach
ATC / advisory: Tower ZZZZ
Aircraft component: Landing Gear Indicating System
Component problem: Malfunctioning
Reporter organization: Air Carrier
Reporter function: Pilot Not Flying; First Officer
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Second reporter function: Pilot Not Flying; Relief Pilot
Anomaly: Aircraft Equipment Problem Critical
Detector: Automation Aircraft Other Automation; Person Flight Crew
When detected: In-flight
Result: Flight Crew FLC complied w / Automation / Advisory; Flight Crew Landed in Emergency Condition; Flight Crew Took Evasive Action; Flight Crew Executed Go Around / Missed Approach; General Declared Emergency
Contributing factors: Aircraft
Primary problem: Aircraft

Narrative: We lowered the gear and had no green indications for the right main gear. Did a low approach by Tower; they confirmed gear appeared down. Kept gear handle down; flew a box pattern to land with emergency declared and crash trucks ready to assist. Normal landing.


Second narrative: I was the Relief Officer for this leg. Captain was pilot flying; First Officer the pilot not flying. Upon gear extension for landing; Right Main Landing Gear light would not illuminate green. Left main and nose gear lights illuminated green OK. EICAS status message: 'LDG Gear Monitor' Tested bulbs and they did not test ok for right main gear. Captain then executed a go around and conducted a low flyby the Tower. He asked First Officer to declare an emergency and have Tower check that all our landing gear was down from their perspective - especially the right main gear. The Tower personnel complied and responded that all our gear indicated 'down and normal'. I gave two spare bulbs to the First Officer to replace the ones in the indicator. The two new bulbs did not test OK. No other abnormal indications or warnings. We declared an emergency and requested ARFF. Captain elected to land on Runway 17L. I had alerted the flight attendants of our situation during the go around and that we would be landing shortly but that I would let them know of any other pertinent information. While on VFR downwind leg; Captain did a quick PA to the passengers. I then called the #1 flight attendant and let him know that we would be landing in a couple minutes but did not expect any problems on landing and that it was just an indicator problem. I also let the #1 flight attendant know that Airfield Rescue and Fire Fighting (ARFF) would be around our aircraft as we landed so the passengers might see fire trucks. We accomplished all pertinent QRH procedures and Captain landed very smoothly on Runway 17L. ARFF met our aircraft on the taxiway and did not see any problems with our aircraft. We then taxied normally to the gate and deplaned in a normal manner. Maintenance was debriefed of our situation with the aircraft landing gear lights. We made an entry in the logbook and departed the aircraft.


Synopsis: After a B767-300 landing gear was lowered; there was no green down indication so the crew declared an emergency and while they executed a go around the Tower reported the gear extended. The flight landed without incident.