N1SPBell Helicopter Textron Canada 429 · 2013

On July 11, 2016, about 1850 eastern daylight time, a hoist system operator was fatally injured after falling from a Bell 429 helicopter, N1SP, while performing external hoist operations at Delaware Coastal Airport (GED), Georgetown, Delaware. The commercial pilot and two other crewmembers were not injured, and the helicopter was not damaged. Day visual meteorological conditions prevailed, and no flight plan was filed for the local public flight, which was operated by the Delaware State Police.

The purpose of the flight was for an emergency response team to complete recurrent rescue hoist training. The three-person team included a rescue specialist, a system operator, and a safety officer. During an evolution, the rescue specialist would be lowered from the helicopter. The system operator, located on the helicopter's skid, would retract the hook back into the helicopter, and the pilot would then return the helicopter to the original hover position in flight. Then, the rescue specialist would cue the crew to return to the target area (where the rescue specialist was located). The system operator would extend the hook, the rescue specialist would connect himself to the hoist, and the system operator would raise the rescue specialist back into the helicopter. Each crewmember was required to perform 3 evolutions as a rescue specialist and a system operator to complete the training. After completing three evolutions, the pilot would land the helicopter; the crew would rotate positions and restart the process. The system operator wore a full body harness and was tethered to the interior of the helicopter through a strap with a carabiner that attached to a D-ring on the harness. The security of each member's safety harness was to be checked before each takeoff during the performance of the second rescue checklist.

According to each of the crewmembers, the accident flight was the seventh evolution of the day, and the first flight where the fatally-injured crewmember acted as the system operator. After the restraints were checked and verified secure, the helicopter lifted off the ground and flew to the practice area on the airfield. As the helicopter hovered about 100 ft above ground level, the system operator requested and was granted permission by the pilot to move to the helicopter skid. The system operator stepped onto the skid and subsequently fell from the helicopter. The pilot stated that throughout the accident sequence, the crew was not rushing while they completed the checklists.

The pilot landed the helicopter immediately and the rescue specialist and safety officer initiated patient care on the system operator.

According to Federal Aviation Administration (FAA) records, the pilot held a commercial pilot certificate with ratings for airplane single-engine land, rotorcraft helicopter, and instrument helicopter. His most recent second-class medical certificate was issued in August 2015. He reported 766 total hours of flight experience, of which 200 hours were in the accident helicopter make and model. His most recent flight review was dated March 14, 2016, and his most recent Hoist Class D External Load Designation Certification was completed on June 15, 2016.

The rescue specialist, safety officer, and system operator were all qualified both as system operators and rescue specialists. All three individuals had most recently completed hoist operation training on June 15, 2016.

According to FAA records, the helicopter was issued an airworthiness certificate on January 14, 2014, and registered to the government in November 2014. It was equipped with two Pratt and Whitney Canada PW207D1, 610 shaft horsepower engines.

The system operator wore an Aerial Machine and Tool Corp. H1037-BL/M full body harness rated to 2,900 pounds. It incorporated 4 tether points; 2 on the front of the harness and 2 on the back. Each tether point incorporated a D-ring that could attach to a carabiner connected to the interior of the helicopter.

The 1854 recorded weather observation at GED included wind from 060° at 6 knots, visibility 10 miles, clear skies below 12,000 ft above ground level, temperature 28°C, dew point 16°C, and an altimeter setting of 30.07 inches of mercury.

According to FAA records, the helicopter was issued an airworthiness certificate on January 14, 2014, and registered to the government in November 2014. It was equipped with two Pratt and Whitney Canada PW207D1, 610 shaft horsepower engines.

The system operator wore an Aerial Machine and Tool Corp. H1037-BL/M full body harness rated to 2,900 pounds. It incorporated 4 tether points; 2 on the front of the harness and 2 on the back. Each tether point incorporated a D-ring that could attach to a carabiner connected to the interior of the helicopter.

The following items were listed in the Essential Hoist Operations Checklists used by the crew and were relevant to how the crew was tethered to the helicopter.

Safety Checklist #1

"8. Restraints SECURED"

Rescue Checklist #2

"5. SO & Safety are TETHERED, ANCHORED & DOUBLE CHECKED.

6. RS 1 & 2 on restraint."

After the accident, the operator modified the Rescue Checklist # 2, to include an additional check that the Safety Officer and System Operator are tethered and anchored to the helicopter.

The FAA's Bioaeronautical Sciences Research Laboratory, Oklahoma City, Oklahoma, performed toxicological testing of the fatally injured crewmember. Fluid and tissue specimens tested negative for ethanol and other drugs.

Examination of the system operator's full body harness by an FAA inspector revealed no evidence of failure or suspicious marks. No webbing, hardware, or stitching damage was noted on the harness. In addition, an examination of the restraint system secured to the interior of the helicopter revealed no anomalies, and all hooks and carabiners operated without anomaly.