Bae-125-850XP flight crew reported they had no green light for right main gear on short final. A fly...

Narrative:

On final approach we put the landing gear down for landing and got a nose gear indication; a left main gear indication; but no right main gear indication. We cycled the gear and same issue. Since we were now on a short final; we asked tower if we could do a low approach and have them confirm our right main gear was down and locked. We did; and they confirmed it appeared to be down. We entered the traffic pattern; ran the checklist and confirmed the gear was down and locked with the standby gear down and locked lights. The tower declared an emergency for us and had the rescue vehicles come meet us; even though we did not declare an emergency. We landed with no incident. My copilot exited the aircraft and pinned the right main gear and talked to emergency personnel. After shutdown and talking with airport police officer we called management and notified them of the situation. We decided to trouble shoot the lights in the gear indicator. We changed the light bulbs and they then worked. Afterwards; we realized that we should not have done this and should have included maintenance.

Original NASA ASRS Text

Title: BAE-125-850XP flight crew reported they had no green light for right main gear on short final. A flyby indicated the gear was down and a safe landing was made with equipment standing by. After a bulb change; all was back to normal.

Narrative: On final approach we put the landing gear down for landing and got a nose gear indication; a left main gear indication; but no right main gear indication. We cycled the gear and same issue. Since we were now on a short final; we asked Tower if we could do a low approach and have them confirm our right main gear was down and locked. We did; and they confirmed it appeared to be down. We entered the traffic pattern; ran the checklist and confirmed the gear was down and locked with the standby gear down and locked lights. The Tower declared an emergency for us and had the rescue vehicles come meet us; even though we did not declare an emergency. We landed with no incident. My copilot exited the aircraft and pinned the right main gear and talked to emergency personnel. After shutdown and talking with airport police officer we called management and notified them of the situation. We decided to trouble shoot the lights in the gear indicator. We changed the light bulbs and they then worked. Afterwards; we realized that we should not have done this and should have included Maintenance.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1025901
Time
Date	201207
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	BAe 125 Series 800
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Component
Aircraft Component	Landing Gear Indicating System
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Flying First Officer
Events
Anomaly	Aircraft Equipment Problem Critical

Bae-125-850XP flight crew reported they had no green light for right main gear on short final. A flyby indicated the gear was down and a safe landing was made with equipment standing by. After a bulb change; all was back to normal.