B757 FLT CREW IS CONCERNED WITH SOP FOR THE JETBRIDGE RETURNING TO THE ACFT IN REGARDS TO CHOCKS AND BRAKES.

Narrative

THE GATE AGENT HAD LEFT AND THE DOORS WERE CLOSED; WITH THE PUSH CREW READY FOR US BELOW WHILE WE CONTINUED OUR SETUP. THE PURSER INTERRUPTED US WITH A PAX PROB; THE CAPT DIRECTED ME TO CALL SFO OPS AND REQUEST THE GATE AGENT RETURN. NOT LONG THEREAFTER THE PUSH CREW INFORMED US THE JETWAY WAS RETURNING. WE SAID THAT YES; THE CUST SVC REP WAS RETURNING TO TAKE CARE OF A PAX PROB. THE PUSH DRIVER VOICED CONCERN BECAUSE THE CHOCKS WERE NO LONGER INSTALLED. AT THIS POINT THE BRAKES WERE SET (NEVER HAVING BEEN RELEASED) AND THE TUG WAS HOOKED UP AND STATIONARY. THE CAPT TOLD THE TUG DRIVER TO INSTALL THE CHOCKS; BECAUSE AT THAT POINT THERE REALLY WAS NO WAY TO STOP THE JETWAY. THE TUG DRIVER WAS CONCERNED THAT THIS WAS A SAFETY/SOP ISSUE. IF THE SOP IS THAT CHOCKS MUST BE INSTALLED FOR THE JETWAY TO RETURN; I AGREE. WE HAVE NO GUIDANCE ON CHOCKS AND JETWAYS. THE CLOSEST I COULD FIND IS THE CAUTION NOTE IN THE FM. IT DOESN'T QUITE APPLY HERE; BUT DOES IMPLY THE PARKING BRAKE IS ENOUGH FOR THE JETWAY.