What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Electrical malfunction, declared emmergency and landed without further incident.
Troubleshooting found the dfdau failed causing cas message and loss of flap and slat controls.
Final maintenance investigation found lav waste water backed up causing u/s check valve to split onto dfdau. Found drain mast water heater ribbon unserviceable, replaced heater ribbon and bolts. New valves installed and all checks serviceable.
As the FAA filed it
ELECTRICAL MALFUNCTION, DECLARED EMMERGENCY AND LANDED WITHOUT FURTHER INCIDENT.
TROUBLESHOOTING FOUND THE DFDAU FAILED CAUSING CAS MESSAGE AND LOSS OF FLAP AND SLAT CONTROLS.
FINAL MAINTENANCE INVESTIGATION FOUND LAV WASTE WATER BACKED UP CAUSING U/S CHECK VALVE TO SPLIT ONTO DFDAU. FOUND DRAIN MAST WATER HEATER RIBBON UNSERVICEABLE, REPLACED HEATER RIBBON AND BOLTS. NEW VALVES INSTALLED AND ALL CHECKS SERVICEABLE.