ST. PAUL, Minn. (WR) — Mechanical failure and human error led to the crash of a Black Hawk helicopter that killed three Minnesota Nationwide Guard members final December, in accordance with a Guard abstract launched Wednesday.

In line with the abstract of outcomes from a army investigative board, the crew was conducting a most energy examine on the primary engine close to St. Cloud. That engine failed throughout the examine, and the quantity two engine was within the idle setting, inflicting a twin engine-out situation.

The primary engine failed as a result of the hydromechanical unit was incorrectly put in, and inspection of the unit’s set up didn’t observe printed set up process, the abstract mentioned.

The abstract additionally mentioned the upkeep check pilot failed to answer a vital scenario throughout the routine upkeep check flight, and the pilot on the controls did not execute an autorotative descent and touchdown.

“It’s vital for us to find out what precipitated this tragic lack of life — not in order that we are able to place blame, however in order that we are able to do all the pieces attainable to make sure nothing like this ever occurs once more,” Brig. Gen. Sandy Finest, interim adjutant common of the Minnesota Nationwide Guard, mentioned in a information launch.

The abstract didn’t embody names of any of the positions listed, the St. Cloud Instances reported.

The UH-60L took off from the St. Cloud Military Aviation Help Facility on Dec. 5 and went lacking for nearly two hours. The crashed helicopter was present in a discipline about 16 miles (25.7 kilometers) southwest of St. Cloud.

The three Guard members who died had been Sgt. Kort M. Plantenberg, 28, of Avon, Minnesota; Chief Warrant Officer 2 James A. Rogers Jr., 28, of Winsted, Minnesota; and Chief Warrant Officer 2 Charles P. Nord, 30, of Perham, Minnesota.

The households of the three have been individually briefed on the outcomes and have requested no media contact, the discharge mentioned.

The army investigation board was appointed by the adjutant common “to offer an correct account” of the crash, in accordance with the discharge.

The investigation additionally made suggestions to the Minnesota Nationwide Guard, together with extra coaching for upkeep check pilots and extra coaching for all pilots about responding to emergency procedures.

The Guard’s investigation is along with a security investigation carried out by the U.S. Military Fight Readiness Heart at Fort Rucker, These outcomes present suggestions to forestall future accidents and aren’t made public.