A B757 CREW; DURING ACFT PUSHBACK AT LGA; EXPERIENCED ACFT DAMAGE WHEN THE TUG DRIVER TURNED THE ACFT PREMATURELY; MAKING CONTACT WITH THE 'JETWAY.'

Narrative

DURING PUSHBACK FROM GATE AT THE LGA FLT CTR; THE TUG DRIVER BEGAN TO TURN THE ACFT BEFORE IT WAS CLR OF THE PAX LOADING BRIDGE. THE ACFT CONTACTED THE LOADING BRIDGE CAUSING A 4-5 FT CUT IN THE SKIN BELOW AND BEHIND THE CAPT'S WINDOW. THE 2L DOOR WAS USED DURING BOARDING AND THE PAX LOADING BRIDGE HAD BEEN BACKED AWAY FROM THE ACFT AS FAR AS IT WOULD GO. AT THE TIME THE PAX LOADING BRIDGE BECAME VISIBLE TO ME; I SIMULTANEOUSLY HEARD THE ACFT CONTACT THE BRIDGE. THE CAPT IMMEDIATELY TOLD THE TUG DIVER TO STOP. CONTRIBUTING FACTORS WERE THE EARLY TIME OF DAY; DARKNESS; AND RAIN. THERE WAS CONSIDERABLE CONGESTION ON THE RAMP AND A HARD TURN OF THE NOSE TO THE CAPT'S L WAS REQUIRED TO MOVE THE ACFT TO THE CLRED LOCATION (TXWY M). BY THE TIME THE COCKPIT CREW SAW THE PAX LOADING BRIDGE; IT WAS TOO LATE. IF OPS CONTINUES TO PUSH THE ACFT FROM THIS GATE TO TXWY M WITH THE TAIL TO THE NW; A SPOTTER UNDER THE PAX LOADING BRIDGE IS A MUST. LATER THE SAME DAY; THE SAME COCKPIT CREW DEPARTED THIS SAME GATE IN THE SAME TYPE OF ACFT. THIS TIME; HOWEVER; OUR CLRNC WAS TO PUSH INTO THE ALLEY WITH THE TAIL POINTED SW. THIS REQUIRED MOVEMENT OF THE ACFT'S NOSE TO THE CAPT'S R MOVING THE ACFT AWAY FROM THE PAX LOADING BRIDGE.