As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING FORMATION FLIGHT THE PILOT REDUCED POWER. WHEN POWER WAS RE-APPLIED THE ENGINE WOULD NOT RESPOND INITIALLY TO THROTTLE INPUT. POWER INCREASED AFTER 7 TO 8 SECONDS. THE FUEL CONTROL UNIT WAS SUBSEQUENTLY REPLACED. PWC WILL INVESTIGATE THE INCIDENT AND ADVISE OF ROOT CAUSE ONCE ESTABLISHED.