As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 6704 4L AFT LEFT DOOR WAS MAKING UNUSUAL SOUNDS ON THE CLIMBOUT. FA SAIT WAS LOUDER THAN USUAL. CORRECTIVE ACTION: INSPECTED DOOR FOUND FWD GIRT BAR LOCK ASSY WAS MISSING, INSTALLED REPLACEMENT ASSY PER B757 AMM 25-66-10 OPS CK GOOD. (5674576)