As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AT 37K FEET OVER CUBA, NUMBER 1 ENGINE ROLLED BACK TO 40-50% N1. AUTO THROTTLES DISENGAGED. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT MIA. REMOVED AND REPLACED (HMU)-HYDROMECHANICAL UNIT LEFT HAND ENGINE (AALA202508222533), PER W/C 08L40073001. REMOVED AND REPLACED NUMBER 1 ENGINE FUEL PUMP PACKAGE (AALA202508221159), PER AMM 73-11-01. ACCOMPLISHED LEFT HAND ENGINE CHIP DETECTOR INSPECTION, PER W/C 08T40079001. ALL OPERATIONAL CHECK NORMAL. NO LEAKS NOTED.