As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT ON TAKEOFF THEY SELECTED THE CLIMB THRUST RATING AND THE MODE AUTOMATICALLY REVERTED TO T/O THRUST MODE. THE CREW RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED CORROSION FROM THE PINS ON RESISTOR MODULES A7055 AND A7056. ALL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.