As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS ON INITIAL POWER APPLICATION FOR TAKE OFF, THE NUMBER ONE ENGINE WAS SUBSTANTALLY SLOWER TO SPOOL UP THAN THE #1 ENGINE. MAINTENANCE REMOVED AND REPLACED THE #1 ENGINE MAIN ENGINE CONTROL IAW JOB CARD 12L40073001 AND LEAK CHECK WAS GOOD IAW JOBCARD 12L40072003.