Narrative:

During the traffic pattern into billings logan airport, I realized the gear would not lock in 'down' position. I went missed on the approach during final for runway 28R, advised bil tower of missed and what the problem was (gear light, green, did not indicate). Center tower instructed to fly a north heading and less than 4500 ft MSL. During this time I recycled the gear and still no green light (airspeed less than 140 KIAS) so I read the emergency checklist for gear will not go down and followed it by pumping lever about 35 times. The green light illuminated. Told ATC and got cleared to land. Landed safely runway 25. Had maintenance look at problem. I talked to the airport fire department and answered questions. Maintenance could not diagnose the problem. I decided to fly the C210 back to ZZZ to seek repairs. Flew back with gear down the entire time.

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Original NASA ASRS Text

Title: C210 PLT EXPERIENCED GEAR EXTENSION PROB WHEN EXTENDING THE GEAR FOR LNDG AND SUBSEQUENTLY, MANUALLY PUMPED THE GEAR DOWN AND LOCKED.

Narrative: DURING THE TFC PATTERN INTO BILLINGS LOGAN ARPT, I REALIZED THE GEAR WOULD NOT LOCK IN 'DOWN' POS. I WENT MISSED ON THE APCH DURING FINAL FOR RWY 28R, ADVISED BIL TWR OF MISSED AND WHAT THE PROB WAS (GEAR LIGHT, GREEN, DID NOT INDICATE). CTR TWR INSTRUCTED TO FLY A N HDG AND LESS THAN 4500 FT MSL. DURING THIS TIME I RECYCLED THE GEAR AND STILL NO GREEN LIGHT (AIRSPD LESS THAN 140 KIAS) SO I READ THE EMER CHKLIST FOR GEAR WILL NOT GO DOWN AND FOLLOWED IT BY PUMPING LEVER ABOUT 35 TIMES. THE GREEN LIGHT ILLUMINATED. TOLD ATC AND GOT CLRED TO LAND. LANDED SAFELY RWY 25. HAD MAINT LOOK AT PROB. I TALKED TO THE ARPT FIRE DEPT AND ANSWERED QUESTIONS. MAINT COULD NOT DIAGNOSE THE PROB. I DECIDED TO FLY THE C210 BACK TO ZZZ TO SEEK REPAIRS. FLEW BACK WITH GEAR DOWN THE ENTIRE TIME.

Data retrieved from NASA's ASRS site as of July 2007 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.