As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENG SLOW TO SPEED (NR 2 AT +50% BEFORE NR 1 MOVED FROM 10%) (6-8 SECONDS BEHIND NR 2) ONCE STABILIZED ALL INDICATIONS NORMAL. RESPONDED NORMAL ONCE ABOVE 45%. REMOVED AND REPLACED NR 1 HMU IAW AMM 73-21-10 AND MT 773-21-10. PERFORMED TEST NR 8 IAW AMM 71-00-00.