AT FORT WAYNE; IN; A FLC FAILS TO PULL GEAR PIN ON L MAIN GEAR. FLT CONTINUED TO DEST WITH L MAIN GEAR EXTENDED.

Narrative

UPON PERFORMING THE PREFLT AND COCKPIT CLEANUP CHKLIST THE FO AND MYSELF FAILED TO VISUALLY CONFIRM THAT THE GEAR PINS HAD BEEN REMOVED FROM THE LNDG GEAR. UPON SELECTING THE GEAR UP AFTER TKOF; THE L MAIN LNDG GEAR FAILED TO RETRACT. WE CONTINUED OUR CLB UP THROUGH THE OVCST AND COMPLETED ALL CHKLISTS AND THEN LOOKED FOR THE GEAR PINS. WE FOUND 2 GEAR PINS ON THE COCKPIT FLOOR BEHIND THE CAPT'S SEAT. OBVIOUSLY THE OTHER ONE WAS LEFT IN THE L MAIN GEAR. BECAUSE OF THE WX AT FORT WAYNE AND THE NEED TO BURN OFF WT IN CASE OF A POSSIBLE GAR; I ELECTED TO CONTINUE TO ORD. THERE WERE NO ICING CONDITIONS AND THE WX THERE WAS BETTER THAN FWA. THE FLT CONTINUED NORMAL TO ORD. IT WAS FLOWN WITH THE GEAR DOWN. WHAT CAUSED THE PROB? WE FAILED TO VISUALLY CONFIRM THAT THE GEAR PINS HAD BEEN REMOVED. PROBABLY HURRIED TOO MUCH. WHAT CAN BE DONE TO CORRECT THE PROB? THE GEAR PINS ARE STOWED BEHIND THE FO'S SEAT AND ARE OFTEN COVERED BY MANUALS ETC. I THINK IT WOULD HELP IF THEY WERE LOCATED IN A MORE VISIBLE PLACE IN THE COCKPIT. ALSO; WE USE FLOWS FOR THE PREFLT CHKLIST. I THINK IT SHOULD BE A DO LIST. READ IT; THEN DO IT. SUPPLEMENTAL INFO FROM ACN 357156: THIS COULD HAVE BEEN AVOIDED IF I HAD VISUALLY CHKED THE PINS AND WE BOTH HAD SLOWED DOWN THE CHKLIST.