AFTER TKOF SF340 FLT CREW RECEIVES UNSAFE UP INDICATION ON THE LANDING GEAR. QRH PROCEDURES ARE COMPLIED WITH; THE GEAR EXTENDS NORMALLY; AND AN UNEVENTFUL LANDING ENSUES.

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AFTER DEP; THE FO BEGAN THE AFTER TKOF FLOW CHKLIST. SUBSEQUENTLY PLACING THE LNDG GEAR IN THE 'UP' POS. SHORTLY THEREAFTER; I HEARD THE HYD PUMP CONTINUE TO RUN; INDICATING THAT THE LNDG GEAR WAS NOT COMPLETELY RETRACTED. I CONFIRMED THIS BY LOOKING AT THE IN-TRANSIT LIGHT AND OBSERVING THAT IT WAS STILL ILLUMINATED. AT THIS POINT IN TIME; THE FO MOTIONED TOWARD THE GEAR HANDLE; TO INFORM ME OF OUR SIT. I TOLD HIM TO KEEP DOING HIS FLOW CHKLIST AND RADIO CALLS; AND I WILL CONTINUE CLBING TO OUR ASSIGNED DEP ALT (ESSENTIALLY; CONTINUING TO FLY NORMALLY); EXCEPT THAT I DID NOT ACCELERATE TO 160 KTS. AT THE MSA; I CONTINUED TO CLB OUT AT 150 KTS; NOT KNOWING THE LNDG GEAR'S TRUE LOCATION. ONCE WE LEVELED OFF AT OUR ASSIGNED ALT; WE COMPLETED A POSITIVE XFER OF CTLS AND THE FO BEGAN TO FLY THE ACFT. MEANWHILE; THE HYD PUMP CONTINUED TO RUN AND THE IN-TRANSIT LIGHT STAYED ILLUMINATED. ADDITIONALLY; I INFORMED ATC THAT WE HAD A LNDG GEAR INDICATION PROB AND I WOULD UPDATE HIM MOMENTARILY; THAT WE NEEDED DELAY VECTORS WHILE WE WORKED THE ISSUE AND THAT WE WOULD BE RESTRICTING OURSELVES TO 150 KTS FOR THE TIME BEING. I THEN BEGAN THE QRH FOR A LNDG GEAR UP UNSAFE INDICATION. ONE OF THE PROCS THE QRH DIRECTED US TO COMPLETE IS A 'RECYCLE' OF THE LNDG GEAR. WE FOLLOWED THE GUIDANCE OF THE QRH AND I PLACED THE LNDG GEAR HANDLE IN THE 'DOWN' POS. ONCE THE 3 GREEN DOWN INDICATIONS ILLUMINATED; THE HYD PUMP AND IN-TRANSIT LIGHT TURNED OFF. WITH ALL NORMAL INDICATION; THE QRH ENDED. AFTER COMPLETION OF THE QRH; I CONTACTED DISPATCH TO INFORM THEM OF OUR SIT AND THAT WE WOULD BE RETURNING TO ZZZ SHORTLY. IT WAS AT THIS TIME THAT I BEGAN TO ATTEMPT TO CONTACT MAINT CTL. I INITIALLY CALLED MAINT CTL A MINIMUM OF 4 OR 5 TIMES. NONE OF MY ATTEMPTS WERE SUCCESSFUL. FOR THE TIME BEING I GAVE UP ON MAINT CTL TO SPEAK WITH THE FLT ATTENDANT AND TO INFORM THE PAX. OVERALL; THIS TOOK A MINIMUM OF 5 MINS TO COMPLETE. DURING THIS PERIOD OF TIME; MAINT CTL NEVER RETURNED ANY OF MY PREVIOUS CALLS. UPON COMPLETION OF MY BRIEFING TO THE PAX AND FLT ATTENDANT; I TRIED CONTACTING MAINT CTL AGAIN -- THEY STILL DID NOT ANSWER. AFTER THIS ATTEMPT; I CONTACTED DISPATCH (WHO ANSWERED ON THE FIRST CALL) AND ASKED THEM TO GET MAINT FOR ME -- THIS WORKED. I EXPLAINED WHAT HAPPENED; WHAT THE FO AND I DID (IE; QRH) FOLLOWED BY ASKING MAINT IF THEY HAD ANY CONCERNS THAT WE SHOULD BE AWARE OF UPON RETURNING TO ZZZ FOR A PRECAUTIONARY LNDG. MAINT CONFIRMED THAT THEY FELT IT WAS SAFE TO RETURN AND LAND. SUBSEQUENTLY; DISPATCH AND I CONFIRMED THAT WE WERE UNDER OUR MAX LNDG WT; THAT DISPATCH WOULD CONTACT ZZZ TO INFORM THEM WE WERE RETURNING; AND THAT I WOULD CALL BACK ONCE SAFELY ON THE GND. IT WAS AT THIS POINT THAT I INFORMED ATC OF THE EXTENT OF OUR SIT AND THAT WE WOULD BE RETURNING FOR A PRECAUTIONARY LNDG IN ZZZ. FURTHERMORE; I STRESSED TO ATC THAT THE LNDG GEAR WAS DOWN AND LOCKED; THAT WE EXPECTED A NORMAL LNDG; HOWEVER; IF SOMETHING DID GO WRONG UPON TOUCHDOWN; THAT WE WOULD LIKE CFR ON THE SIDE OF THE RWY STANDING BY. ATC COMPLIED; CFR WAS STANDING BY AND WE TURNED ONTO A VECTOR FOR THE ARPT. ONCE THE ACFT STABILIZED ON THE NEW HDG; THE FO AND I AGAIN PERFORMED A POSITIVE EXCHANGE OF CTLS AND I BEGAN TO FLY THE ACFT AGAIN. DURING THE APCH BRIEF; THE FO AND I DISCUSSED POSSIBLE ISSUES THAT COULD ARISE AND WHAT EACH OF US WOULD DO IN THE EVENT THAT THE WORST HAPPENED (IE; GEAR COLLAPSE ON TOUCHDOWN). MOREOVER; WE BRIEFED THE VISUAL APCH; CONTINUED INBOUND TO ZZZ AND LANDED UNEVENTFULLY. UPON CLRING THE RWY; WE CANCELED OUR CFR RESPONSE AND CONTINUED TO THE GATE.