E120 CREW WAS UNABLE TO RETRACT THE MAIN LNDG GEAR.

Narrative

AFTER TKOF NOSE GEAR CAME UP NORMALLY; BUT BOTH MAIN GEAR STAYED DOWN AND LOCKED. CREW PERFORMED CHKLIST; AND ALL 3 (NOSE AND BOTH MAINS) GEAR LOCKED DOWN. CREW HAD ALL NORMAL INDICATIONS AND MADE A NORMAL LNDG. AFTER LNDG; IT WAS DISCOVERED BOTH MAIN GEAR LOCK PINS WERE IN PLACE. THE ACFT HAD BEEN FERRIED EARLIER THAT DAY BACK TO ORLANDO DUE TO A HYD PROB. THE GEAR HAD BEEN PINNED IN THE DOWN POS; AND ALL PINS WERE SAFETY WIRED TO MAKE SURE THE PINS WOULD NOT MOVE. ALSO THE VISIBLE RED FLAGS WERE REMOVED FOR THE FERRIED FLT. (THESE 'RED' FLAGS HANG ABOUT 1 FT BELOW THE ACFT TO HELP THE CREW VISUALLY SEE THE PINS ARE IN.) WE; THE CREW; WERE ASSIGNED THIS ACFT WITH VERY SHORT NOTICE AS A REPLACEMENT DURING OUR SCHEDULED DAY OF FLYING. IN OUR HURRIED ACFT CHANGE; AND TRYING TO STAY ON SCHEDULE; WE MISSED THE WIRED SAFETY PINS ON THE MAIN GEAR. (THESE WOULD NORMALLY BE REMOVED; LIKE THE NOSE GEAR PIN WAS; BEFORE THE ACFT WAS RETURNED TO DUTY.) CONTRIBUTING TO THE MISS OF THE PINS WAS BOTH MYSELF AND THE CAPT'S IDEA THAT THE OTHER PERSON WAS GOING TO DO THE PREFLT. THAT CONFUSION CAME FROM A STATEMENT THE CAPT MADE TO ME EARLIER THAT DAY DURING A CREW BRIEFING TO THE EFFECT THAT THE CAPT WOULD DO THE WALKAROUND TO STRETCH HIS LEGS. THE CAPT DIDN'T FULLY INSURE TO ME HIS INSTRUCTIONS ON PREFLT WALKAROUNDS. BETTER CREW COM WAS NEEDED. SUPPLEMENTAL INFO FROM ACN 453873: IN OUR HURRY TO CHANGE ACFT AND GET BACK ON SCHEDULE; WE MISSED THE 'STEALTH' PINS (WHICH NORMALLY WOULD HAVE BEEN REMOVED BEFORE WE CAME TO THE PLANE). CONTRIBUTING WAS THAT BOTH MYSELF AND THE FO THOUGHT THE OTHER WAS GOING TO DO A NORMAL THOROUGH PREFLT. THAT CONFUSION CAME FROM A STATEMENT I HAD MADE EARLIER TO THE EFFECT THAT I WOULD DO POSTFLT WALKAROUNDS; AND I DIDN'T INSURE THAT THE NEW-TO-THE-JOB FO FULLY UNDERSTOOD MY INSTRUCTIONS.