LOG BOOK ENTRY MISSING.

Narrative

I WAS FO ON FLT XXX LEAVING JFK FOR NRT. JUST PRIOR TO PUSHBACK; WE ASKED THE AGENT FOR THE SECURITY FORM STATING THE PREFLT SECURITY CHKS HAD BEEN COMPLETED; THE AGENT INFORMED US THAT THE ACFT HAD PREVIOUSLY FLOWN THAT DAY FROM LHR TO JFK. UPON LOOKING AT THE LOGBOOK; IT WAS DISCOVERED THAT THE INFO TO CREW ENTRY HAD NOT BEEN ENTERED IN THE BOOK. AT THAT TIME; THE CAPT HAD THE RELIEF PLT CONTACT DISPATCH TO SEE IF WE COULD GET CONFIRMATION THAT THE SECURITY CHECK HAD IN FACT BEEN COMPLETED. THE DISPATCHER CONTACTED LONDON AND GAVE US THE TIME DATE AND NAME OF THE CAPT WHO SIGNED THE FORM IN LONDON. AT THAT TIME; OUR CAPT THOUGHT THAT SUFFICED IN OUR REQUIREMENT OF VERIFYING THE CHK HAD BEEN PREVIOUSLY PREFORMED. AT THAT TIME I STATED I DID NOT THINK THAT WAS THE CASE AND THAT WITHOUT THE ENTRY IN THE LOG BOOK FROM THE LONDON FLT THAT A NEW SECURITY INSPECTION WAS REQUIRED. THE CAPT SAID HE DID NOT THINK THAT WAS THE CASE AND MADE THE DECISION TO GO WITHOUT GETTING A NEW SECURITY CHK PERFORMED.