As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OFF OF OAK; CLIMBING OUT OF 17500' THE #1 ENGINE ROLLED BACK TO 31% N1. NO ENGINE PARAMETER WERE EXCEDED. EMERGENCY WAS DECLARED AND WE RETURNED TO OAK / PERFORMED FIM 73-23 TAKS 801. FOUND TO BE FAILURE OF EEC. REMOVED & REPLACED #1 ENG EEC PER AMM 73-21-60. EEC INSTALLATION TEST COMPLETED. PERFORM IDEAL ENG RUN PER 71-00-00. OPS CHECK NORMAL. NO FAULTS FOUND.POS #! PN OFF: 1853M33P05 PN ON: 2042M67P02 SN OFF: LMDNA492 SN ON: FFFN1053