As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON APPROACH TO DESTINATION HELIPAD & AS POWER REDUCED BELOW 80% N1, NR 2 ENG WAS NOTED TO DROP TO 0% TORQUE WITH ASSOCIATED, ENG SPLIT, CAUTION. ATTEMPTS TO REJOIN FLI NEEDLES WITH COLLECTIVE N2 TRIM SWITCH MET WITH NEGATIVE RESULTS. OEI FLIGHT CONDITIONS ESTABLISHED, APPROACH ABORTED. PILOTS CHECKLIST EMER & MALFUNCTION PROCEDURES FOLLOWED FOR ENG UNDER SPEED WHILE DIVERTING. MX NOTIFIED.