A B407 HELI PLT FORGOT TO SECURE THE FUEL CAP.

Narrative

ON MAR/SUN/05; I HAD JUST LANDED AND AFTER FINISHING MY POSTFLT; I BEGAN TO REFUEL MY ACFT. WHILE REFUELING; I GOT A CALL FOR ANOTHER FLT. I FINISHED REFUELING THE ACFT; CLOSED THE DOOR TO THE FUEL CAP ON THE ACFT; AND RETURNED THE FUEL HOSE TO A SAFE AREA AWAY FROM THE ACFT. I THEN WALKED UP TO THE COCKPIT TO RETRIEVE MY FLASHLIGHT TO DO A QUICK PREFLT LOOKING OVER THE ACFT. FROM THE FRONT OF THE ACFT; I SHINED THE LIGHT ABOVE; BELOW; AND TO BOTH SIDES OF THE ACFT TO LOOK FOR ANYTHING OUT OF THE ORDINARY. I DID NOT PERFORM A USUAL WALKAROUND BECAUSE I HAD PERFORMED A POSTFLT BEFORE REFUELING THE ACFT; JUST MINS EARLIER. AFTER MY CHK WITH THE LIGHT; I HOPPED BACK IN THE ACFT AND PERFORMED A NORMAL STARTUP AND HEADED OVER TO A NEARBY LOCATION TO PICK UP THE FLT CREW. AFTER SIGNALING THEM TOWARD THE ACFT; ONE CREW MEMBER CLBED IN AND SAID THAT THE FUEL CAP WAS OPEN. I ASKED IF IT WAS STILL UNSECURE AND WAS TOLD THAT IT WAS NOW OK AND SAFE TO GO. WE TOOK OFF AND LANDED SHORTLY AFTERWARDS. UPON LNDG; I DEBRIEFED THE CREW; FIRST ASKING THEM IF THEY FELT UNSAFE DURING THE FLT BECAUSE OF THE FUEL CAP BEING LOOSE. THIS KIND OF CAP HAS TO BE LATCHED AND TURNED ABOUT 45 DEGS BEFORE IT COMPLETELY CLOSES. I ALSO ASKED IF ANYONE WANTED TO RPT THIS; SINCE THERE WAS NO DAMAGE; AND IT DID NOT HINDER OUR MISSION. WE AGREED TO NOT RPT THE SIT BECAUSE AFTER INSPECTION; I NOTICED THAT THE CAP WAS IN OPERABLE CONDITION; AND NO DAMAGE DONE.