What was found
AFTER TAKEOFF CREW COULD NOT ACTUATE MACH/STAB TRIM WARNING CAS MESSAGE ON EICAS. EMERGENCY DECLARED AND AIRCRAFT RETURNED TO DEPARTURE AIRPORT WITHOUT INCIDENT. MAINTENANCE REPLACED FAULTY TRIM DISCONNECT SWITCH.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AFTER TAKEOFF CREW COULD NOT ACTUATE MACH/STAB TRIM WARNING CAS MESSAGE ON EICAS. EMERGENCY DECLARED AND AIRCRAFT RETURNED TO DEPARTURE AIRPORT WITHOUT INCIDENT. MAINTENANCE REPLACED FAULTY TRIM DISCONNECT SWITCH.