What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Aircraft performing part 133 external load operations experienced engine power loss. NTSB released aircraft to owner, and ship repositioned to owner's hangar. No airframe fault could be found to cause engine power loss. Engine removed from aircraft and test run at repair facility. Engine operation normal. Aircraft operated during freezing rain and snow. Aircraft flight manual stated operation in falling or blowing snow required engine inlet deflectors to be installed. No deflectors installed on aircraft.
As the FAA filed it
(-23) AIRCRAFT PERFORMING PART 133 EXTERNAL LOAD OPERATIONS EXPERIENCED ENGINE POWER LOSS. NTSB RELEASED AIRCRAFT TO OWNER, AND SHIP REPOSITIONED TO OWNER'S HANGAR. NO AIRFRAME FAULT COULD BE FOUND TO CAUSE ENGINE POWER LOSS. ENGINE REMOVED FROM AIRCRAFT AND TEST RUN AT REPAIR FACILITY. ENGINE OPERATION NORMAL. AIRCRAFT OPERATED DURING FREEZING RAIN AND SNOW. AIRCRAFT FLIGHT MANUAL STATED OPERATION IN FALLING OR BLOWING SNOW REQUIRED ENGINE INLET DEFLECTORS TO BE INSTALLED. NO DEFLECTORS INSTALLED ON AIRCRAFT.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.