A close call between a helicopter and a small aircraft near Hollywood Burbank Airport on March 2 is drawing renewed attention to a risky air traffic practice: relying on pilots to maintain “visual separation” in busy airspace. In a new general notice to airmen (GENOT) announced by the Federal Aviation Administration, the agency is suspending the use of visual separation in certain busy controlled-airspace settings and requiring controllers to apply radar-based separation instead. The move follows heightened scrutiny after recent close calls and a deadly midair collision near Washington, D.C., as reported by the Associated Press.
What Happened Over Burbank
On March 2, a helicopter and a small aircraft that had been cleared to arrive at Hollywood Burbank came dangerously close to each other, according to an Associated Press report. The incident is now the subject of a formal federal investigation, with the National Transportation Safety Board maintaining a public case docket for the event.
The Burbank near-miss did not occur in isolation. It followed a fatal midair collision near Washington, D.C., that killed people and intensified scrutiny of how air traffic controllers handle mixed traffic, particularly helicopters flying near commercial flight paths, according to the AP report. Together, these events have renewed concerns about the “see-and-avoid” method, a decades-old practice in which pilots are expected to visually spot and steer clear of nearby aircraft rather than relying on controller-directed spacing. In complex terminal areas with intersecting routes and converging altitudes, that expectation can be difficult to sustain amid modern traffic density.
The FAA Ends Visual Separation in Busy Airspace
Transportation Secretary Sean P. Duffy and the FAA announced a general notice to airmen, known as a GENOT, that suspends the use of visual separation in certain busy controlled-airspace settings, requiring controllers to apply specified radar-based lateral or vertical separation instead. Under the change described by the FAA, controllers must keep aircraft at defined distances apart using radar tools rather than relying on pilots to see each other. While the exact separation standards vary by context, the core requirement is that controllers can no longer rely on visual separation alone to manage converging traffic in these environments.
Class B airspace surrounds the nation’s busiest airports, including Los Angeles International. Class C covers airports with moderate traffic volumes, like Hollywood Burbank. Terminal Radar Service Areas handle a similar tier of operations where radar coverage is provided but the airspace is not formally designated as Class B or C. In practical terms, the GENOT is intended to reduce situations where controllers clear converging aircraft and then rely primarily on pilots to maintain separation by sight. That is a significant operational shift in crowded terminal environments, especially where commercial jets, business aircraft, helicopters, and training flights all converge.
Much of the public conversation after the D.C. crash focused on helicopter routes and military flight training. But the Burbank close call shows the problem extends to general aviation aircraft operating near commercial airports. A small plane on approach to a runway shared the same airspace with a helicopter, and the existing rules left separation largely to the eyes of the pilots involved. The new GENOT closes that gap by making radar-measured spacing mandatory, forcing controllers to build in buffers that account for closure rates, wake turbulence, and the time needed for pilots to respond to instructions.
Van Nuys Pattern Changes Offered Early Evidence
Before the GENOT was issued, the FAA had already been testing a related fix just a few miles from Burbank. Van Nuys Airport, one of the busiest general aviation fields in the country, sits close enough to Hollywood Burbank that its traffic patterns can affect arriving commercial flights. The agency’s community engagement materials describe evaluations showing fewer TCAS alerts for Hollywood Burbank arrivals after lowering the Van Nuys traffic pattern. TCAS, or the Traffic Collision Avoidance System, triggers cockpit warnings when aircraft get too close, so fewer alerts can indicate fewer close-proximity events.
Based on those results, the FAA announced it will permanently maintain the lowered Van Nuys traffic pattern. That decision is significant because it shows the agency moving beyond temporary fixes and locking in structural changes to how aircraft flow through the San Fernando Valley corridor. The Van Nuys adjustment and the broader GENOT share the same logic: replace human visual judgment with engineered, measurable margins of safety. By shifting pattern altitudes and tightening how aircraft are sequenced, controllers can better stack and separate traffic streams feeding into Burbank’s arrival and departure corridors.
Why “See and Avoid” Kept Failing
Visual separation has been a bedrock of American air traffic control since the early days of aviation. The concept is simple: in good weather, pilots can see other aircraft and avoid them. Controllers facilitate this by pointing out traffic, but the final responsibility falls on the flight crew. For decades, that approach was considered adequate in low-density environments and was written into procedures that assumed relatively sparse skies.
The trouble is that modern airspace around cities like Los Angeles is far denser than anything the original rule anticipated. Helicopters, small propeller planes, business jets, and commercial airliners share narrow corridors at different speeds and altitudes. A pilot in a single-engine Cessna descending toward Burbank may have seconds to spot a helicopter crossing from the side, especially when sun glare, haze, cockpit workload, or simple distraction intervenes. Even when pilots do see one another, closure rates can make last-second evasive maneuvers risky in their own right. Radar-based separation removes that gamble by requiring controllers to actively maintain distance, using precise altitude and lateral measurements displayed on their screens.
Critics of the old system have argued for years that see-and-avoid is too fragile as a primary safety layer in dense, complex airspace. The D.C. collision and the Burbank near-miss have added urgency to those concerns. Whether the GENOT becomes a permanent rule or is modified later could depend in part on what investigators find through the NTSB’s formal process. The safety board’s work is divided among specialized units, and its aviation-focused offices will play a central role in examining how separation practices performed in these events.
Broader Procedural Overhaul at Burbank
The radar separation mandate is not the only change affecting Hollywood Burbank. The FAA has also released a Draft Environmental Assessment for southern departure procedures at the airport, opening a public comment period for residents and stakeholders. That review, documented on the agency’s Burbank engagement page, examines how revised departure paths, altitudes, and climb profiles would alter noise exposure and safety margins for communities under the flight tracks. The environmental process requires the FAA to weigh operational benefits against noise and emissions impacts, which means any safety-driven change must also pass neighborhood scrutiny.
Local officials and residents have long raised concerns about the concentration of flight paths over certain neighborhoods, particularly during southbound departures that turn toward dense parts of the Los Angeles basin. The Draft Environmental Assessment signals that the agency is willing to reexamine those procedures in light of both noise complaints and the safety lessons from Burbank’s recent incidents. If finalized, new departure routes could redistribute traffic and further separate slower aircraft from high-performance jets on climb-out, complementing the radar-based separation requirements in the terminal area.
The NTSB’s Role and What Comes Next
The NTSB sits at the center of how these policy shifts will be evaluated. As the independent safety watchdog for U.S. transportation, the board maintains a public-facing hub at its main website, where it posts accident dockets, factual reports, and final recommendations. For both the D.C. midair collision and the Burbank near-miss, investigators will reconstruct flight paths, interview controllers and pilots, and analyze radar and cockpit data to determine not just what happened, but why existing safeguards failed to prevent it.
Those efforts are cataloged on the agency’s investigations portal, which tracks cases from the initial notification through the probable-cause finding. The NTSB’s final reports typically include safety recommendations, and the findings in the Burbank and Washington-area cases could inform whether the FAA keeps, modifies, or expands the GENOT approach in future policy decisions.
For now, the immediate impact for pilots and controllers is clear. In the nation’s busiest terminal environments, visual separation is no longer an accepted tool for managing converging traffic. Controllers must build their plans around hard numbers on their radar scopes, and pilots can expect more structured instructions on headings, altitudes, and speeds as they approach and depart major airports. The close call over Burbank and the tragedy over Washington, D.C., exposed the limits of trusting human eyesight in crowded skies. The FAA’s new policy, backed by early evidence from Van Nuys and under the watchful eye of federal investigators, marks a decisive move toward a more tightly engineered margin of safety in American airspace.
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*This article was researched with the help of AI, with human editors creating the final content.
