ON APCH INTO AZO; A CL65; FLAPS WILL NOT EXTEND BEYOND THE 30 DEG SETTING.

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APCH BACKED UP BY BACK COURSE APCH FOR RWY 17 AT AZO. ON APPROX A 3 MI FINAL FOR RWY 17; CALL WAS MADE FOR 'FLAPS 40 DEGS; BEFORE LNDG CHK.' WHEN FLAPS WERE SELECTED FROM 30 DEGS TO 40 DEGS; THE FLAPS FAILED TO RESPOND AND REMAINED AT 30 DEGS. WE WERE ALSO SHOWN A 'FLAPS FAIL' MESSAGE ON THE EFIS WARNING DISPLAY. THERE WAS NO FLAP ASYMMETRY AND THE ACFT WAS UNDER NORMAL CTL. AT THIS POINT WE ELECTED TO ABANDON THE LNDG TO RUN THE ABNORMAL CHKLIST TO TRY TO SORT THE PROB OUT. AFTER COMPLETING THE CHKLIST; IT WAS APPARENT THAT THE FLAPS WERE GOING TO STAY AT 30 DEGS. WE WERE FLYING A VFR TFC PATTERN WITH THE TWR; DID THE CHKLISTS; ASSURED OURSELVES WE HAD SUFFICIENT RWY AND THEN MADE A SAFE; UNEVENTFUL LNDG. AFTER DEPLANING THE PAX; WE PWRED THE ACFT DOWN. AFTER A FEW MINS; WE REPWRED AND STARTED THE APU. WE TURNED ON ALL HYD PUMPS. AT THIS TIME WE OPERATED THE FLAPS SEVERAL TIMES AND WERE UNABLE TO DUPLICATE. NO FAILURE MESSAGE; NO DEFECTS NOTED. AS THERE WAS NO FAILURE/DEFECT AT THAT TIME; NO MAINT WRITE-UP WAS MADE. THESE TYPES OF PROBS (TEMPORARY) SEEM TO HAPPEN WITH COMPUTERS ON ADVANCED/AUTOMATED ACFT QUITE FREQUENTLY. RESET/ON/OFF SEEMS TO CLR NUISANCE PROBS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: ALTHOUGH THE ACFT COULD HAVE LANDED EASILY WITH 30 DEGS OF FLAP; THE RPTR STATED THEY MADE A GAR TO DO THE CHKLIST FOR FLAP FAILURE TO EXTEND. THEY COMPLETED THE ABNORMAL CHKLIST AND WERE STILL UNABLE TO GET THE FLAPS TO MOVE. THEY DID LAND USING AN EXTRA 8 KTS OF SPD ON FINAL APCH. AFTER ALL PAX WERE DEPLANED; THEY TOOK ALL ELECTRICAL PWR OFF THE ACFT; LET THE ACFT SIT UNPWRED FOR A FEW MINS; THEN REAPPLIED ELECTRICAL PWR. WHEN ELECTRICAL PWR WAS APPLIED; THE FLAPS WORKED NORMALLY. RPTR STATES THAT MANY FLCS CARRY CHKLISTS AROUND WITH THEM; TELLING WHAT CIRCUIT BREAKERS TO PULL IN ORDER TO TURN OFF AND REAPPLY ELECTRICAL PWR SO AN ELECTRICAL COMPONENT WOULD BEGIN TO RESPOND TO CTL INPUTS. THIS IS ONE OF THE CHARACTERISTICS OF ACFT WITH LARGE DEMAND FOR ELECTRICITY. THE FLC NEVER MADE ANY LOGBOOK WRITE-UP REGARDING THE IMMOVABLE FLAPS; AS THEY HAD FIXED THE ACFT WITH THE ELECTRICAL SHUTDOWN AND REPWR. ACFT WAS A CL-65.