Narrative:

On approach we selected gear down and did not see a green indication for right main gear. We tested lights; tested good; then recycled gear with still no down and locked indication. At that point we elected to go around and proceeded to circle the airport while we worked the problem. Eventually; we climbed to 10000 ft MSL so that we could get a good signal for aircraft phone and called the manufacturer. They concurred that we had completed all of the checklist items and that nothing more could be done to rectify the situation except those procedures in the emergency checklist. We proceeded back to ZZZ where emergency equipment was standing by. We completed the last item on the emergency checklist which included 'blowing' the emergency nitrogen gear bottle for safety reasons and proceeded with an uneventful landing. We did not declare an emergency as fuel or WX was not a consideration and ATC merely vectored us clear of other traffic while we dealt with the gear situation. We were informed later that ATC had declared an ATC emergency. I do not believe that any traffic conflicts or deviation from regulations occurred during this time. Callback conversation with reporter revealed the following information: the electrical connector for the landing gear indication system was found to be dangling in the wheel well on post flight. It was apparently not correctly fastened during the last maintenance cycle.

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Original NASA ASRS Text

Title: G IV FLT CREW REPORTS UNSAFE MAIN GEAR DURING APPROACH. AFTER ALL ATTEMPTS TO OBTAIN A SAFE INDICATION HAVE FAILED AN UNEVENTFUL LANDING ENSUES.

Narrative: ON APCH WE SELECTED GEAR DOWN AND DID NOT SEE A GREEN INDICATION FOR R MAIN GEAR. WE TESTED LIGHTS; TESTED GOOD; THEN RECYCLED GEAR WITH STILL NO DOWN AND LOCKED INDICATION. AT THAT POINT WE ELECTED TO GO AROUND AND PROCEEDED TO CIRCLE THE ARPT WHILE WE WORKED THE PROB. EVENTUALLY; WE CLBED TO 10000 FT MSL SO THAT WE COULD GET A GOOD SIGNAL FOR ACFT PHONE AND CALLED THE MANUFACTURER. THEY CONCURRED THAT WE HAD COMPLETED ALL OF THE CHKLIST ITEMS AND THAT NOTHING MORE COULD BE DONE TO RECTIFY THE SITUATION EXCEPT THOSE PROCS IN THE EMER CHKLIST. WE PROCEEDED BACK TO ZZZ WHERE EMER EQUIP WAS STANDING BY. WE COMPLETED THE LAST ITEM ON THE EMER CHKLIST WHICH INCLUDED 'BLOWING' THE EMER NITROGEN GEAR BOTTLE FOR SAFETY REASONS AND PROCEEDED WITH AN UNEVENTFUL LNDG. WE DID NOT DECLARE AN EMER AS FUEL OR WX WAS NOT A CONSIDERATION AND ATC MERELY VECTORED US CLR OF OTHER TFC WHILE WE DEALT WITH THE GEAR SIT. WE WERE INFORMED LATER THAT ATC HAD DECLARED AN ATC EMER. I DO NOT BELIEVE THAT ANY TFC CONFLICTS OR DEV FROM REGS OCCURRED DURING THIS TIME. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE ELECTRICAL CONNECTOR FOR THE LANDING GEAR INDICATION SYSTEM WAS FOUND TO BE DANGLING IN THE WHEEL WELL ON POST FLIGHT. IT WAS APPARENTLY NOT CORRECTLY FASTENED DURING THE LAST MAINTENANCE CYCLE.

Data retrieved from NASA's ASRS site as of May 2009 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.