As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - FLT 0536 - WHILE AIRCRAFT WAS TAXIING TO GATE, THE AIRCRAFT TAXIING BEHIND REPORTED SEEING A TAILPIPE FIRE AT NR 1 ENGINE TAILPIPE. MAINTENANCE PERFORMED A HOT SECTION BORESCOPE PER T/C 15M72304, NO DEFECTS WERE NOTED. AS A PRECAUTION THE NR 1 ENGINE OIL SCAVAGE PUMP WAS REMOVED AND REPLACED IAW T/C R5M79301, ENGINE RUN OPERATIONAL CHECK WAS GOOD. OIL PRESSURE AND TEMPERATURE WAS NORMAL, NO LEAKS WERE NOTED.