As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LEFT ENGINE WAS VERY SLOW TO START. INVESTIGATION REVEALED THE FUEL NOZZLE SHROUD WAS INSTALLED 180 DEGREES FROM CORRECT POSITION WHICH BLOCKED FUEL FLOW THROUGH THE NOZZLE CAUSING SLOW STARTS. THE FUEL NOZZLES HAD BEEN REPLACED 291.1 HOURS PREVIOUSLY. REPLACED ALL NOZZLES TO CORRECT THE PROBLEM.