As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE EXPERIENCED A LOSS OF POWER DURING ECU SELECTION FROM TOP TO NORMAL, ALSO WHEN IN TOP AND REDUCING POWER. LEVER ANGLE POWER REDUCED AS IF THE ENGINE WAS IN MANUAL. NO MANUAL. NO MANUAL CAUTION LIGHT ILLUMINATION. REMOVED AND REPLACED THE NR 1 ENGINE HMU AND RIGGED IAW MM 72-01-40. LEAK AND OPS CHECKED GOOD.