As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REF T/C 05-020-01#2 ENG HAS EEC C1 FAULT, WITH CORRELATED MAINTENANCE MESSAGE 73-43983 ELECTRONIC OVERSPEED THRUST CONTROL MALFUNCTION ACCOMMODATION TEST FAILED. GROUNDED - YES. REF B737-9 FIM G73-20-00-810-927, ACCOMPLISHED INITIAL EVALUATION AND TESTS PASS WITH NO FAULTS. NO FURTHER MAINTENANCE NECESSARY.