Witness, ‘Saw Pieces, And Then The Tail Section Separating From The Helicopter’
Location: Leesburg, FL Accident Number: ERA21FA233
Date & Time: May 25, 2021, 17:47 Local Registration: N9FH
Aircraft: BHI H60 HELICOPTERS LLC UH-60A Injuries: 4 Fatal
Flight Conducted Under: Part 91: General aviation – Flight test
On May 25, 2021, about 1747 eastern daylight time, a BHI H60 Helicopters LLC, UH-60A, N9FH, was destroyed when it was involved in an accident near Leesburg International Airport (LEE), Leesburg, Florida. The pilot, copilot, and two crew members were fatally injured. The helicopter was operated as a Title 14 Code of Federal Regulations Part 91 post-maintenance test flight.
According to the operator, a new water tank and snorkel were installed on the helicopter to facilitate firefighting operations in accordance with supplemental type certificate (STC) #SR00933DE on May 17, 2021. Several days of ground testing and calibration were performed before the accident flight, which was the first flight after the STC was installed.
Witnesses reported that the helicopter made six uneventful passes in front of the operator’s hangar at LEE and dropped water that was picked up from a lake adjacent to the airport. On the seventh pass, an employee of the operator noticed the snorkel swinging. He called the LEE air traffic control tower on the phone and told the controller to ask the pilot of the helicopter to slow down and land immediately.
Before the controller could contact the pilot, the helicopter transitioned to forward flight, gaining altitude and airspeed. The employee noticed the snorkel “violently” swinging and he then heard a loud bang, which he believed was the result of the snorkel contacting the main rotor blades or tailboom. He then saw pieces, and then the tail section separating from the helicopter. The helicopter started to spin and fell below the tree line. He heard a loud explosion and saw smoke rise above the tree line. According to another witness who worked for the operator, she missed the helicopter’s first pass but watched the remaining six passes. She noted that the water being dropped from the tank was “very dirty.” On the helicopter’s last pass, while it was coming in and slowing down, she noticed the snorkel swing in a large circle and at one point, the snorkel end came very close to the main rotor blades. She
immediately started waving her arms at the pilot to try and get his attention, but he did not see her. As the pilot transitioned to forward flight, she ran beside the helicopter and continued to wave her arms.
Shortly after the helicopter climbed and gained airspeed, she heard a loud bang and saw multiple main rotor blades separate and hit the tail section. She then saw the tail section fall to the ground and the helicopter enter a flat spin.
The helicopter was located in heavily wooded, swampy terrain about 1322 ft east of runway 3. The helicopter came to rest slightly inverted on its left side on a heading of 040° magnetic. The tail rotor section was found about 78 ft north of the main wreckage. One half of a rotor blade was found about 600 ft south of the main wreckage and one half of another rotor blade was found about 200 ft west of runway 3. Parts of the newly installed water tank and snorkel assembly were found on the west side edge of runway 3. The water pump housing, which was installed near the snorkel inlet was heavily fragmented. The stainless-steel snorkel suction cage was located about 50 ft west of runway 3 and collocated with a section of main rotor blade. There were several pieces of fairings and lightweight material lodged in the top of trees along the flight path from the edge of the tree line to the main wreckage.
The landing gear, main rotor system, main rotor drive system, engine, hydraulic system, and the forward portion of the tail rotor drive system were thermally damaged by the postcrash fire. The majority of the cockpit, cabin, and flight controls were consumed by the postcrash fire. The wreckage was recovered and retained for further examination.