A CL65 ON A VISUAL APCH REQUIRED FLAPS 45 DEGS ON EXTENSION; TRAILING EDGE FLAPS STUCK AT 37 AND 36 DEGS CAUSE UNKWN.

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CLRED FOR VISUAL APCH RWY 24 GRB. FO WAS PF. CALLED FOR FLAPS 45 DEGS; FLAPS ALREADY SET AT 30 DEGS. SPEED WAS 165 KTS AT 2500 MSL. A 'FLAPS FAIL' MESSAGE (CAUTION) APPEARED. THE FLT CTL POS INDICATED 37 DEGS AND 36 DEGS FLAPS SETTING. WE MAINTAINED 2500 MSL TURN HDG 180 DEGS. RAN THE QRH CHKLIST. WE WERE UNABLE TO REACH OUR COMPANY VIA ACR RADIO OR GND OPS. WE RAN THE LNDG NUMBERS IN OUR FLT STANDARDS MANUAL. TALK TO THE FA AND THE PAX. WE HAD THE TWR DISPATCH THE FIRE EQUIP; BUT DID NOT DECLARE AN EMER. (FA AND PAX WERE INFORMED OF THE EQUIP ON THE TXWYS.) LANDED ON RWY 36 WITH MORE OF A HEADWIND (310 DEGS) AND A LOWER RWY. THIS WAS THE SECOND EVENT FOR THE FLAPS FAIL WITHIN A 72 HR PERIOD. HAVING BETTER COM WITH COMPANY. I PERFORMED THE LNDG. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THIS WAS THE SECOND FLAPS UP LNDG IN ONE WEEK. HE IS UNAWARE OF THE CORRECTIVE ACTION TAKEN AS THE AIRPLANE WAS MAINT FERRIED TO A MAINT STATION WITH THE TRAILING EDGE FLAPS LOCKED AT 20 DEGS. THE TRAILING EDGE FLAPS ON THIS AIRPLANE ARE SUBJECT TO AN AD DUE TO TWISTING. THE AD REQUIRES A VISUAL FLAP INSPECTION BY THE FLC OR A TECHNICIAN PRIOR TO FLT. THE FLAP EXTENSION SPEEDS HAVE BEEN LOWERED AS PART OF THE AD. THE RPTR SAID IT APPEARS THEY ARE CORRECTING AN ACFT MECHANICAL PROBLEM WITH AN OPERATING PROC.