A CL65 FLT CREW TAXIING OUT OF THE GATE AT BUF SNAGGED THE GPU POWER LINE WITH A WING TIP. NO DAMAGE WAS DONE.

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AT APPROX XA33 WE WERE TAXIING OUT OF GATE IN BUF UNDER MARSHALLER DIRECTION. WE HAD JUST COMPLETED THE AFTER START CHK. AS WE PASSED THROUGH THE TURN; THE MARSHALLER SUDDENLY GAVE US THE STOP SIGNAL. WE CAME TO AN IMMEDIATE STOP. THE MARSHALLER WAS POINTING AT THE L WING. THE CAPT SAID THE L WINGLET HAD MADE CONTACT WITH THE GPU PWR CORD HANGING OFF THE JETBRIDGE. WE IMMEDIATELY SHUT DOWN AND INSTRUCTED THE PAX TO REMAIN SEATED. THE CAPT WENT TO GO INSPECT IT. WE SAW THAT THERE APPEARED TO BE NO DAMAGE; AND ALTHOUGH THE WING CLRED THE JETBRIDGE IT DID NOT CLR THE PWR CORD HANGING FROM IT. THE CAPT INSTRUCTED THE RAMP NOT TO MOVE OR TOUCH ANYTHING; AND THEN HE WENT INSIDE TO MAKE PHONE CALLS AND TALK WITH SUPVRS. WHILE HE WAS INSIDE; THE RAMP MOVED THE JETBRIDGE AND CORD AGAINST HIS INSTRUCTIONS. WE PROCEEDED TO CALL ALL APPROPRIATE PARTIES. WE WERE INSTRUCTED THAT IF MAINT DETERMINED THE ACFT AIRWORTHY THAT WE SHOULD INDEED CONTINUE ON TO ZZZ. MAINT CAME SHORTLY AFTER AND CLRED THE WRITE-UP; WE BOARDED BACK UP; AND CONTINUED ON TO ZZZ. IN MY OPINION; THERE WERE A NUMBER OF CONTRIBUTING FACTORS. WE WERE EXTREMELY TIRED FROM OUR SHORT OVERNIGHT. ALTHOUGH IT WAS SCHEDULED TO BE XA26; WE DID NOT ACTUALLY GET TO THE HOTEL; SIGNED IN; AND RECEIVE OUR REVISED SCHEDULES VIA FAX UNTIL APPROX XA30-XB00. GIVING US VERY LITTLE SLEEP AFTER HURRYING TO GET DINNER. THIS OCCURRING AFTER HAVING TO FERRY AN ACFT WITH MAINT ISSUES. THE WHOLE TRIP WAS EXTREMELY STRESSFUL WITH THE NUMEROUS MAINT WRITE-UPS. WE ALSO RECEIVED PAPERWORK FOR THE WRONG ACFT IN BUF. WE CAUGHT THE MISTAKE ON THE BEFORE START CHK. AFTER BOARDING; WE WERE TRYING TO DO A QUICK TURN AND THIS; OF COURSE; FURTHER COMPOUNDED OUR ALREADY TERRIBLE DAY AND MADE US MORE DELAYED. THIS; I BELIEVE; LED US TO FEEL RUSHED. ANOTHER PROB WAS IT WAS A VERY CONFINED SPACE NEAR THE TERMINAL; AND CONGESTED WITH RAMP EQUIP. WITH SO MUCH ATTN BEING NEEDED TO DIFFERENT AREAS IN THE TURNING RADIUS OF THE ACFT IT WAS EASY TO NOT THINK TO LOOK UP AT THE WINGLET AREA WHILE TURNING AS THIS IS NOT AN EVERYDAY TYPE OF TURNOUT. ANOTHER PROB I THINK WAS THAT THERE WAS NO WING WALKER ON EITHER SIDE FURTHER INCREASING THE WORKLOAD ON BOTH US AND THE MARSHALLER. ALL THESE ISSUES; I BELIEVE; LED TO A PERFECT STORM. ALTHOUGH IT APPEARS THIS RESULTED IN A RELATIVE NON-EVENT WITH NO DAMAGE OR INJURIES; WE WERE ABSOLUTELY DEVASTATED TO THINK OF WHAT COULD HAVE HAPPENED. I KNOW I PERSONALLY TOOK SEVERAL IMPORTANT LESSONS FROM THIS; AND THAT I WILL BE MUCH QUICKER TO SPEAK UP WHEN I AM FEELING SO EXHAUSTED. I BELIEVE I SAW THE MARSHALLER HOLD UP THE STOP SIGNAL FIRST AND I SHOULD HAVE BEEN QUICKER AND HIT THE BRAKES WHILE SAYING STOP.