A G4 DEPARTED WITH THE GEAR PINS STILL INSTALLED AFTER A DISTRACTED CAPT'S ACFT PREFLT. THE ACFT CONTINUED TO ITS DESTINATION.

Narrative

WE WERE SCHEDULED TO DEPART ZZZ FOR ZZZ1 AT XC00 LCL TIME. WE ARRIVED AT THE ARPT APPROX XA30 LCL. I HAD ASKED MY FO TO CHK AND PRINT THE WX FOR THE RTE HOME. I ADVISED HIM I WOULD TAKE CARE OF THE PREFLT. THE ACFT WAS PARKED IN AN AREA WITH VERY LITTLE LIGHTING. DURING THE PREFLT I RECEIVED A PHONE CALL FROM OUR PAX AT APPROX XA50 LCL; THAT THEY WERE GONG TO BE EARLY AND WERE LEAVING THE DOWNTOWN AREA AT THIS TIME AND SHOULD BE THERE WITHIN 30 MINS. AGAIN DURING THE PREFLT I RECEIVED A SECOND PHONE CALL FROM THE PAX; THEY NEEDED TO KNOW WHICH FBO TO COME TO AND WHERE IT WAS LOCATED. I ADVISED THEM OF THE FBO AND CONTINUED MY PREFLT DURING THE CONVERSATION. AFTER THE PAX ARRIVED I LOADED THE BAGS AND THE FO CLOSED THE MAIN CABIN DOOR. MY NORMAL ROUTINE IS; AS POLICY STATES; TO CHK FOR 'CHOCKS AND GEAR PINS' BEFORE CLOSING THE DOOR. I DO THIS EVERY TIME; HOWEVER I WAS STILL LOADING THE BAGS WHEN THE FO CLOSED THE MAIN DOOR. TAXI AND TKOF WAS NORMAL UNTIL GEAR RETRACTION. THIS IS WHERE WE KNEW THAT I HAD FORGOTTEN TO REMOVE THE GEAR PINS. WE CONTINUED TO OUR DEST WHICH WAS ONLY 25 MINS FROM DEP WITH NO FURTHER PROBS. SOLUTIONS TO PROB: CAPTS DO NOT SWAP ROLES. THIS ALLOWED ME OUTSIDE MY NORMAL ROUTINE. GEAR PINS ARE TO BE SEEN BY OTHER CREW MEMBER OR DOOR IS NOT CLOSED. I SHOULD HAVE PAID MORE ATTN TO THE PREFLT THAN TO THE TIME CONSTRAINTS WE WERE PUT UNDER. SUPPLEMENTAL INFO FROM ACN 796450: I SAID IS THERE ANYTHING UNSAFE OR ILLEGAL ABOUT THIS? HE SAID NOT THAT HE COULD THINK OF. I THOUGHT FOR A MIN AND I COULD NOT THINK OF ANYTHING THAT WOULD CAUSE A PROB WITH THE AIRPLANE. I ASKED WOULD WE HAVE THE FUEL TO CONTINUE? WE BOTH LOOKED AT THE FUEL AND DISTANCE AND DECIDED THAT WE DEFINITELY DID. AT THAT POINT; THE DECISION TO CONTINUE TO ZZZ WAS MADE. WE WERE THEN VECTORED TOWARD THE FIRST FIX ON OUR FLT PLAN AND CLBED TO 14000 FT. I SET THE MANUAL SPD AT 215. THE CRUISE; DSCNT; AND LNDG WERE ALL NORMAL WITH THE EXCEPTION OF THE GEAR BEING DOWN. I THINK ONE FACTOR THAT LEAD TO THE UNINTENTIONAL TKOF WITH GEAR PINS INSTALLED WAS THE EARLY ARR OF THE PAX. THE CAPT SAID THAT HE RECEIVED A PHONE CALL FROM THE PAX DURING HIS PREFLT. THIS COULD HAVE CAUSED A DISTR AND INTERRUPTED HIS PREFLT ROUTINE. ADDITIONALLY; THE NORMAL PROC IS FOR THE FO TO PERFORM THE PREFLT. THE CAPT ELECTED TO DO THE PREFLT AND DELEGATE OTHER DUTIES TO ME. WHILE SWITCHING SOME DUTIES OCCASIONALLY IS NOT UNCOMMON; IT IS NOT THE NORMAL ROUTINE. THE FACT THAT THE FLT WAS AT NIGHT AND THE AIRPLANE WAS PARKED IN A POORLY LIT AREA CONTRIBUTED TO ME NOT SEEING THE GEAR PINS WHILE WALKING TOWARD THE AIRPLANE. IN THE FUTURE I WILL TAPE A NOTE ON THE THROTTLES THAT WILL ONLY BE REMOVED ONCE BOTH PLTS SEE THAT THE 3 PINS HAVE BEEN REMOVED. THIS SHOULD PREVENT THIS INCIDENT FROM HAPPENING AGAIN.