Monday, August 3, 2020

U.S. Air Force releases report on cause of mysterious RQ-4 crash in Sierra Nevada mountain range

Recommended

U.S. Marine Corps 4th Tanks Battalion deactivates after 77 years

Dozens of Marines gathered to pay homage with their families and say goodbye to 4th Tanks Battalion as they officially completed their sundown after...

Lockheed Martin awarded $34M contract for Korea’s F-16 life extension

Pentagon’s No.1 weapons supplier Lockheed Martin Corp. has been awarded a $34 million modification to contract for the Republic of Korea's F-16 aircraft life...

Boeing will support upgrades to Japan’s F-15J fleet

U.S. aerospace giant Boeing has reported that it signed a Direct Commercial Sale agreement with Mitsubishi Heavy Industries (MHI) to support upgrades to Japan’s...

Swiss Army to receive Indago 3 small drones from Lockheed Martin

Pentagon’s No.1 weapons supplier Lockheed Martin Corp. has announced that the Swiss Army chooses Indago 3 small unmanned aircraft systems (UAS) for tactical reconnaissance...

General Dynamics ekes out $625 million profit in the second quarter

General Dynamics, one of the largest U.S. defense contractors, reported its second-quarter results. Net earnings of $625 million on revenue of $9.3 billion. The details...

More details about the mysterious RQ-4B Global Hawk unmanned surveillance aircraft crash in June 2017 were released on 26 September.

The Air Combat Command Accident Investigation Board (AIB)  has released their reports detailing what about the RQ-4B Global Hawk that crashed June 21, 2017,  in an uninhabited area near Lone Pine, in the eastern Sierra Nevada mountain range.

According to the AIB, the unmanned surveillance aircraft broke up after experiencing issues with one of its navigational data devices/ navigators. This caused the RQ-4B to enter an unusual flight altitude and experience airspeeds that exceeded structural limitations, from which the aircraft could not recover.


- ADVERTISEMENT - CONTINUE READING BELOW -

The RQ-4B, from the 9th Reconnaissance Wing at Beale AFB, California, was conducting a ferry flight from Edwards AFB, California, to Beale AFB at the time of incident. An aircrew of contractors from the Northrop Grumman Corporation was operating the aircraft at the time of the mishap.

This aircraft has four navigators and operates with two “on” and two “off” while in a normal configuration. The AIB president found the cause of the mishap was one of the two in-use navigation systems on the remotely piloted aircraft produced erroneous navigational data and the other navigators did not detect the erroneous data.

Shortly after takeoff, two of the navigators were disabled in accordance with standard procedure. The aircraft climbed and flew to planned waypoints uneventfully until one of the enabled navigators began producing erroneous navigational data. The aircraft failed to detect the erroneous data, causing the aircraft to roll into a nearly inverted position and enter a dive that resulted in excessive airspeed. The aircraft subsequently exceeded its structural limitations and was unable to recover. The aircraft broke up during flight and crashed in an unpopulated and rugged area between Lone Pine and Mount Whitney, California.

The aircraft left a debris field from Lone Pine until its point of impact at Mount Whitney. The debris field included portions of the Inyo National Forest. Preliminary environmental analysis indicates no significant impact to the forest or wildlife. Portions of the wreckage have been recovered and the Air Force is working with the U.S. Forest Service for the remainder of the wreckage cleanup.

The loss of Government property is valued at $79 million. There were no reported fatalities, injuries or damage to civilian property.

The RQ-4 provides a broad overview and systematic surveillance using high-resolution synthetic aperture radar (SAR) and long-range electro-optical/infrared (EO/IR) sensors with long loiter times over target areas. It can survey as much as 40,000 square miles of terrain a day, which is an area the size of South Korea or Iceland.

If you wish to report grammatical or factual errors within our news articles, you can let us know by using the online feedback form.

Executive Editor

Recommended

U.S. Marine Corps 4th Tanks Battalion deactivates after 77 years

Dozens of Marines gathered to pay homage with their families and say goodbye to 4th Tanks Battalion as they officially completed their sundown after...

Lockheed Martin awarded $34M contract for Korea’s F-16 life extension

Pentagon’s No.1 weapons supplier Lockheed Martin Corp. has been awarded a $34 million modification to contract for the Republic of Korea's F-16 aircraft life...

Boeing will support upgrades to Japan’s F-15J fleet

U.S. aerospace giant Boeing has reported that it signed a Direct Commercial Sale agreement with Mitsubishi Heavy Industries (MHI) to support upgrades to Japan’s...

Swiss Army to receive Indago 3 small drones from Lockheed Martin

Pentagon’s No.1 weapons supplier Lockheed Martin Corp. has announced that the Swiss Army chooses Indago 3 small unmanned aircraft systems (UAS) for tactical reconnaissance...

General Dynamics ekes out $625 million profit in the second quarter

General Dynamics, one of the largest U.S. defense contractors, reported its second-quarter results. Net earnings of $625 million on revenue of $9.3 billion. The details...

TRENDING NOW

Related News

Serbia buys Chinese air defense missile system

Serbia is buying newest Chinese-made FK-3 air defense missile system, according to local media. Balkanska bezbednosna mreza (Balkan Security Network), quoting state-owned arms import company...

Aerojet Rocketdyne reports strong results driven by GMLRS and MRBM programs

Aerojet Rocketdyne Holdings reported results for the three months ended June 30 that surpassed analyst expectations thank to increase in net sales primarily driven...

British Army upgrades its Foxhound armoured vehicles

The British Army has begun upgrading Foxhound armoured vehicles in the run-up to the deployment of its troops in Bosnia and Herzegovina. "8 Parachute Field...

Blue Angels receives first F/A-18E Super Hornet

The U.S. Navy Flight Demonstration Squadron, the Blue Angels, has received first Blue Angels F/A-18 Super Hornet fighter aircraft. On Tuesday, the Navy Flight Demonstration...