In was shortly following when SOFREP opened its doors in 2012 that we published an article about the stealth helicopters used to transport SEAL Team Six for Operation Neptune Spear, the mission that killed Bin Laden in Abottabad, Pakistan. Now it appears that key elements of our analysis are being confirmed, along with additional details about the politics revolving around the use of said helicopters.

In 2012 we wrote about the stealth helicopter that crash-landed in Bin Laden’s Pakistan hideout:

After consulting with experts in the field of rotary-wing aircraft, it seems that the most likely cause of the crash was due to a phenomenon known to pilots as “settling with power,” with atmospheric conditions potentially playing a role as well. Helicopter pilots will almost always attempt to land while facing into the wind, however, the pre-determined approach into the objective in this case may have actually given them a downwind landing. If the rotor wash pushed from the rotors down to the ground comes back up and pushes into the descent path of the helicopter, it can then make the aircraft unstable. This is how settling with power can destabilize a helicopter. The rotors essentially created a vortex of dead air space that could no longer generate lift.

The rotor-blade system needs clean, that is, uniform, air to produce lift. If instead it gets un-uniform air, such as air previously disturbed by the helicopter’s own rotor wash, then the pilot could be in for some trouble.

At this point, the pilot would have begun to lose control of the aircraft from self-induced turbulence. Without lift and maneuverability, he would have to conduct a controlled crash as a last resort. As we see in the pictures, the tail-rotor section split over an outer wall of the compound. Did this obstacle also disrupt the air flow from the main rotor system and destabilize the aircraft? Maybe.

In Sean Naylor’s new book, “Relentless Strike,” his sources come to the same conclusion. “The cause of the crash was a phenomenon called vortex ring state, or settling with power, which occurs when a helicopter’s rotors cannot get the lift required from the turbulent air of their own downwash.” (Naylor, 399) As we speculated three years ago, a SEAL Team Six source confirms in “Relentless Strike,” “that air bled through that chain link fence” (Naylor, 399) at the rehearsal site at Harvey Point, North Carolina, which is a CIA facility. “But in reality the compound had those solid walls,” the SEAL Team Six operator continued, “and that bad air just came right back up into the rotor blades and that thing just lost power.” (Naylor, 399)

Interestingly, Naylor also reports that there was a lot of consternation during the planning phase of Neptune Spear about whether or not the stealth Black Hawks, which were untested in combat conditions, were suitable for the mission. The aircraft were much more difficult to fly than the 160th’s main helicopter, the MH-60 Black Hawk, and were unstable when the pilots had to hover in place. Apparently, the stealth helicopters were part of the plan sold to President Obama, and their use was clearly not open to question.

“David Cooper, Team Six’s command master chief, put this view to McRaven early in the planning process,” (Naylor, 395) bringing up to Admiral McRaven that they should plan for alternate methods of infiltration. In fact, SEAL Team Six and the Ranger Regiment had been standing by, deployment after deployment, in Bagram, Afghanistan, with troops committed to waiting for the green light to capture or kill Bin Laden. To this end, the SEALs constantly trained in High Altitude High Opening (HAHO) military free fall as their preferred infiltration method. It was not to be. “McRaven found Cooper’s argument disrespectful and pressured Van Hooser [SEAL Team Six’s commanding officer] to fire his command master chief, which the Team 6 commander refused to do.” (Naylor, 395)