As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT # 2930 MCO-DCA (AIRTURN BACK TO MCO). NO LAVS WOULD FLUSH AFTER AIRBORNE AND REACHING FL370. MULTIPLE WASTE AND WATER ERRORS NOW SHOWING ON CMS PANEL; AIRCRAFT ARRIVED WITH NUMEROUS CAN NETWORK MESSAGES OF TOILET SYSTEM. T/S FOUND CAN LOW PIN AT PLUG A431 P2 TERMINAL 42 PUSHED BACK. SECURED AFTER ALL LAVS AND LEVEL SESNORS READINGS SHOWING NO FAULTS. OPS CHECK NORMAL. PER AMP BD500-A-J38-30-01-02AAA-320A-A. NOTE VAC GEN ON MEL 620408