As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"PREVIOUS REPORTED ROTTEN EGG SMELL DESCENDING THROUGH 12,000 FT FROM REAR OF A/C. -PERFORMED OPS CHECK OF APU AND PACKS, NO DEFECTS/OR ODORS NOTED AT THIS TIME CHK DONE IAW TSM 05-50-00 (SUSPECTED MISCELLANEOUS TYPE 10 PAX/AMBIENT AIR ODOR). MOC 68083 "