As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT GROUNDED - AFTER TAKE-OFF, THROUGH CLIMBOUT TO CRUISE ALTITUDE (FL360), CREW REPORTED ROTTEN EGG SMELL THROUGHOUT CABIN. ACCOMPLISHED MCM 05-96-70 SMOKE/ODOR/FUMES INITIAL TROUBLESHOOTING. FOUND L1 DOOR DRAIN VALVE CLOGGED. REMOVED AND REPLACED GRAY WATER DRAIN VALVE PER AMM 38-31-02, OPERATIONAL AND LEAK CHECKS GOOD. NO ODOR SMELL NOTED. OKAY FOR SERVICE.