AFTER DEP NOSE GEAR WILL NOT RETRACT. MAINT SAID NO GEAR PINS INSTALLED. FO SAID NONE SEEN ON PREFLT. CONTINUES FLT TO DEST.

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ACFT WAS AT HANGAR WHEN I WALKED OVER TO GET ACFT MAINT PERSONNEL SAID ACFT WAS NOT READY. THEY DIDN'T KNOW THAT IT WAS SCHEDULED OUT AT X20 PM. ACFT HAD BEEN GNDED BECAUSE OF AN AUTO FEATHER PROBLEM AND A DME PROBLEM I ASKED WHAT THEY WERE GOING TO DO. MECH SAID REPLACE DME UNIT AND MEL THE AUTO FEATHER. MECH SAID HE HAD RUN THE ACFT AND COULDN'T DUPLICATE THE PROBLEM AND SIGNED IT OFF. I TOLD THE FO TO DO THE PREFLT AND WHEN MAINT HAD THE ACFT READY FOR THEM TO BRING THE ACFT TO THE GATE. AFTER TKOF THE GEAR (NOSE GEAR) STAYED DOWN AND LOCKED. THE TWR VERIFIED THIS. I ASKED MY FO IF HE HAD VERIFIED THE NOSE GEAR PIN WAS PULLED. HE SAID HE HADN'T NOTICED ANY SAFETY FLAGS. I THEN CALLED PKB MAINT TO SEE IF THEY HAD INSTALLED A NOSE GEAR PIN. ALL 3 SAID NO. I DECIDED TO CONTINUE THE FLT TO PIT BECAUSE OF THEIR FULL TIME RESCUE VEHICLES. I LANDED AT PIT UNEVENTFULLY. AFTER DEPLANING THE PEOPLE; WE FOUND A PIN INSTALLED WITH A FLAG. THE FLAG WAS BARE ALUMINUM; NO PAINT. MAINT IS NOW PAINTING ALL FLAGS RED AND YELLOW AND INSTALLING LONGER CHAINS.