GEAR UNSAFE INDICATION ON FINAL APCH; EXECUTED GAR TO TROUBLESHOOT. DISTR CHKING OPS MANUAL; ACFT CLBED 500 FT AND POSSIBLY INTO CLASS B AIRSPACE. GEAR PROB WAS RESOLVED AND ACFT LANDED UNEVENTFULLY.

Narrative

FLYING ON IFR FLT PLAN FROM MSN; WI; TO FCM; MN. SQUAWKING ASSIGNED IFR XPONDER CODE. WAS BROUGHT INTO CLASS B AIRSPACE BY ZMP. TURNED OVER TO MSP APCH AND WAS GIVEN VECTOR DIRECT TO FCM. WHEN FCM WAS IN SIGHT; WAS GIVEN 'CLRED FOR RWY 27L VISUAL APCH; CONTACT TWR.' CONTACTED FCM TWR AND CLRED TO LAND RWY 27L FCM. ON FINAL I NOTED NO GREEN GEAR LIGHTS; AND ADVISED TWR I HAD NO GREEN OR UNSAFE GEAR INDICATION AND WAS GOING TO DO A MISSED TO SORT OUT THE PROB. AS I PASSED OVER RWY 27L TWR CHKED WITH FIELD GLASSES AND ADVISED ME I HAD NO GEAR VISIBLE. I ADVISED I WOULD CLB TO THE W AND TRY TO SORT OUT THE SIT AS I CIRCLED W OF FCM AT THE SAME TIME FCM TWR ADVISED ME THEY WOULD CANCEL MY IFR FLT PLAN. I CLBED TO 2500 FT MSL AND BEGAN TO TRIM FOR LEVEL FLT. I REACHED TO REAR FOR MY PLTS OPERATING MANUAL AND RETRIEVED IT. WHEN I LOOKED BACK I WAS PASSING THROUGH 3000 FT MSL. I LOWERED THE NOSE; WENT BACK TO 2500 FT MSL; REDUCED PWR; RETRIMMED FOR LEVEL FLT. WHILE TURNING TO THE S (I MAY HAVE RE-ENTERED THE CLASS B AIRSPACE DURING MY CLB -- I AM NOT SURE; BUT KNOW I WAS CLOSE). AFTER FOLLOWING PROCS; THE PROB WAS SOLVED IN A VERY SHORT TIME AND I TURNED E FOR A L DOWNWIND RWY 27L FCM. I ADVISED TWR PROB SOLVED AND WAS CLRED TO LAND RWY 27L. AT THAT TIME I WAS ALSO ADVISED I SHOULD BE SQUAWKING 1200 ON MY XPONDER AS MY IFR HAD BEEN CANCELED. I THEN CHANGED MY IFR SQUAWK TO 1200 AND LANDED WITHOUT FURTHER INCIDENT.