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News :: Technology
Unmanned Aerial Vehicles Won't Go Away
by Air Safety Week
10 Nov 2007
The National Transportation Safety Board's historic ruling on the probable cause of the April 2006 Predator B unmanned aircraft crash in Arizona represents just the first of a series of unmanned systems accident investigations that will follow as drones of all sizes finally win approval by federal air safety regulators to operate unfettered in the National Airspace System (NAS).
November 6th, 2007 09:47 AM EDT
The Safety Board ruled that the unmanned aerial vehicle (UAV) accident was chiefly caused by the ground-based pilot's failure to use checklist procedures to safely operate the aircraft. The NTSB issued 22 safety recommendations to the U.S. Customs and Border Protection and the Federal Aviation Administration covering "a wide range of safety issues involving the civilian use of unmanned aircraft," said Safety Board Chairman Mark V. Rosenker.
He said the contractor's performance in providing airborne border patrol surveillance for the federal agency was not without issue. "This was not as tight (an operation) as it should have been. CBP bought what it believed was a solid operation, but mistakes were being made."
At issue is whether unmanned aerial systems (UAS) will ever provide "an equivalent level of safety" to manned aircraft operating in the NAS.
"This investigation has raised questions about the different standards for manned and unmanned aircraft and the safety implications of this discrepancy," said Rosenker. "Why, for example, were numerous unresolved lock- ups of the pilot's control console even possible while such conditions would never be tolerated in the cockpit of a manned aircraft?"
Expressing concerns about how manned and unmanned aircraft will share the same airspace, Chairman Rosenker said, "The fact that we approved 22 safety recommendations based on our investigation of a single accident is an indication of the scope of the safety issues these unmanned aircraft are bringing into the NAS."
The Safety Board's investigation revealed that the pilot was not proficient in the performance of emergency procedures, which led to the accident. "The pilot is still the pilot, whether he is at a remote console or on the flight deck."
But Rosenker is bullish about the future of UAVs in the civil world.
"UAVs will be extremely important for the future of aviation. I see them being used effectively in the civil environment, and eventually in the commercial environment. These are exciting times, but we need a well thought out plan for UAV operations and safety if they will be as successful as I believe they can be."
"This accident investigation will go a long way to making unmanned aircraft operations in the NAS a much safer and efficient way of doing business.
In an interview after the NTSB hearing, Rosenker told Air Safety Week that "we want to address UAV operations in the NAS early, before we have a lot of these devices flying in airspace, possibly creating a very serious potential for accidents."
He said achieving "an equivalent level of safety" for drone operations in the NAS is not just a goal, but a given. "We shouldn't settle for anything less.
A UAV can't be a rogue, exempt from appropriate rules and regulations that keep our airspace safe and thus avoids chaos."
The CBP may again deal with the NTSB in that the law enforcement agency will acquire at least six Predator B UAS to patrol both the northern and southern borders of the U.S.
The National Aeronautics and Space Administration (NASA) and the U.S. Forest Service have been early proponents of regular UAS operations in the NAS, having successfully demonstrated how UAS can counter major wildfires fueled by extreme heat and drought.
This past summer, they conducted flights of a Predator B remotely piloted vehicle equipped with advanced imaging and communications equipment to capture real-time thermal infrared images of western states wildfires, which were passed along to firefighters on the ground.
The Ikhana, a Predator B modified for civil science and research missions, flew again in October, assisting firefighters battling the Southern California wildfires.
"In the not-too-distant future, we'll look back at unmanned aircraft demonstrations and realize that these flights paved the way for civilian use of unmanned aircraft that benefit all of us, said NASA's Brent Cobleigh.
The FAA has already cleared Predators for domestic disaster relief operations, giving the U.S. Air Force permission in 2006 to conduct humanitarian missions in civil airspace as required and within specific flight restrictions.
The USAF used a Global Hawk UAS to collect high-altitude imagery of the Southern California wildfires, representing the first domestic use of the military surveillance platform.
Meanwhile, the National Oceanic and Atmospheric Administration is sending small drones with advanced weather-watching equipment deep into hurricanes.
At least three local police departments have purchased or have budgeted money to buy small drones to help them respond to emergencies and for traffic and crowd control. But the FAA has stepped in, keeping the police UAS grounded pending establishment of operating regulations for unfettered flights.
Chief Donald Shinnamon, director of public safety for the city of Holly Hill, Florida, and an expert on the use of manned rotorcraft and UAS for law enforcement, says opportunities exist for use of drones at the local government level. "There is a huge market for fire departments and emergency management departments to employ this technology because UAS are affordable and have a lower noise signature," he believes.
"We all stand to benefit from local departments employing small UAS," he said, but he charges that "regulation is lagging behind the technology and that the FAA declines to engage in a meaningful dialogue with non-Department of Defense UAS operators."
The U.S. Department of Justice (DOJ) recently issued a technical bulletin regarding law enforcement use of unmanned aircraft systems. It said "UAS is a rapidly emerging technology that has exceptional appeal to law enforcement" but DOJ warned that the operation of a UAS by a public agency, whether it is federal, state or local law enforcement, is enforced by FAA regulations.
The DOJ said prior to purchasing or leasing a UAS, potential law enforcement users should consider the following:
* For a public aircraft operation, the FAA holds the position that a Certificate of Authorization (COA) is required to operate UAS in the National Airspace;
* The FAA has stated publicly that COAs would not be issued for use of a UAS over populated areas, such as may be defined by the yellow areas on aviation sectionals (aviation map). This includes most cities and densely populated areas;
* The FAA will consider issuing a COA for operations in unpopulated areas as long as the agency seeking the COA can demonstrate that the operation is safe, that sufficient risk mitigations are in place, and the operators have sufficient training (which includes a pilot's license and medical certificate);
* Any law enforcement agency operating a UAS will be required to establish their own airworthiness for the UAS. The airworthiness establishment is the responsibility of the agency and not the vendor. Remember, any agency applying for and receiving a COA assumes liability for the entire operation.
While vendor information may be used in deeming an aircraft airworthy, it should not be the only information relied upon;
* The operation of a UAS requires a FAA certificated pilot with a current class II medical certificate and an observer, who while not required to be a pilot, but must have a class II medical certificate;
* A vendor approaching a law enforcement agency offering to demonstrate a UAS to an agency must have an experimental airworthiness certificate issued by the FAA prior to the flight. A vendor cannot rely upon an agencies COA to fly the aircraft. COAs are only issued for aircraft that qualify as "public" aircraft;
* The rules allowing the recreation use of model aircraft by hobbyist DO NOT allow law enforcement agencies to use a UAS without a COA;
* There are currently no comprehensive studies that confirm the safety records or vendor published data regarding the use of UASs. Problems identified by the military's evaluation of UAS have included radio interference, unexplained control loss, and the durability of the units for repeat flight operations. Department of Defense UAS Program Managers expressed at a recent FAA meeting on UAS, that they rarely get 10 or more missions accomplished with one UAS unit due to crashes;
* It is not anticipated that the FAA will amend their position on the operations of UAS before the year 2010. However, there are two key activities taking place that will push the airspace access issue forward. The first is that the FAA has agreed to conduct two test projects with major metropolitan police departments. One is Miami/Dade, and the other is Houston. Each of these will provide valuable insight into the difficulties that may exist in operating UAS in urban environments. The other activity is the creation of new regulation for small UAS to fly in the airspace. This recent development is just starting and will be the genesis for getting small UAS flying in a majority of the U.S. without a COA. Rulemaking can take time, however, so stick with the COA process for the next year or two.
Through the Office of Justice Program's National Institute of Justice (NIJ) and its Aviation Technology Program, law enforcement will have the chance to voice their opinions regarding the use of UAS in the NAS.
NIJ is working with the FAA on rules and regulations regarding the use of UAS by law enforcement that both enhance the mission of public safety and provide for the safety of other aircraft in the national airspace and those on the ground.
NIJ is planning a forum on the use of UAS by law enforcement with FAA participation during the winter of 20072008. NIJ invites interested law enforcement agencies to participate in this process.
NTSB Cites Extensive Safety Issues in First Investigation of Unmanned Aircraft Accident
by Aircraft Maintenance Technology Online
October 17th, 2007 10:32 AM PDT
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