As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)ON DESCENT AFTER EXTENDED CRUISE AT 43K, WHEN INCREASING POWER FROM FLIGHT IDLE AT AROUND 20K, #1 ENGINE FAILED TO RESPOND UNTIL A MUCH LOWER ALTITUDE AND WARMER TEMPERATURE REACHED. MINIMUM FUEL FLOWADJUSTED AND FLOWN OK. THREE MONTHS LATER SAME MALFUNCTION OCCURRED. FUEL CONTROL UNIT CHANGED.