Regulations & Safety
NTSB Report: Envoy Airlines Wrong Runway Landing at Chicago O’Hare
NTSB final report details how pilot bias and ATC oversight led Envoy Airlines flight 3936 to land on the wrong runway at Chicago O’Hare.
NTSB Final Report: “Plan Continuation Bias” Led to Envoy Airlines Wrong Runway Landing at O’Hare
The National Transportation Safety Board (NTSB) has published its final report regarding a serious incident involving an Envoy Airlines passenger jet at Chicago O’Hare International Airport (ORD). The investigation concludes that a combination of pilot error, technical mismanagement, and air traffic control (ATC) deficiencies led an Embraer 170 to land on the wrong runway on September 25, 2024.
According to the report, released on February 25, 2026, Envoy Airlines flight 3936 (ENY3936) landed safely on Runway 10L despite being cleared for and assigned to Runway 10C. While no injuries or damage occurred to the aircraft (registration N772MR), the NTSB highlights the event as a significant example of “wrong-surface landing” risks, a top safety priority for federal regulators.
The investigation identifies “plan continuation bias” and “expectation bias” as primary psychological factors that caused the flight crew to continue an unstable approach despite lacking critical instrument guidance.
Sequence of Events: Changing Plans and Cognitive Load
The NTSB investigation details a complex arrival phase where the flight crew faced a rapid series of runway assignment changes. These changes likely contributed to a high cognitive workload and “expectation bias” as the crew prepared for landing.
According to the final report, the crew prepared for four different runways in succession due to shifting weather conditions and airport operations:
- Initial Plan: Runway 27R
- First Update: Runway 9L
- Second Update: Runway 10R
- Final Assignment: Runway 10C
The NTSB noted that this sequence of changes forced the crew to repeatedly reprogram the Flight Management System (FMS) and briefing protocols, setting the stage for the errors that followed.
Technical Mismanagement in the Cockpit
Once cleared for a visual approach to Runway 10C, the crew attempted to back up their visual flight path with an Instrument Landing System (ILS) approach to ensure precision. However, the aircraft’s systems failed to “autotune” the correct ILS frequency for Runway 10C.
In an effort to correct the automation failure manually, the captain tuned the navigation radios himself. The investigation revealed a critical error in this process:
“The flight crew’s decision to continue the approach without the correct ILS frequency in the FMS [Flight Management System].”
The report states that the captain manually tuned 108.4 MHz, which was an incorrect frequency, instead of the required 108.95 MHz for Runway 10C. Furthermore, the second radio was tuned to 113.0 MHz, a VOR frequency that provided no vertical or lateral guidance for the landing. Deprived of valid instrument data to verify their alignment, the crew relied entirely on visual cues and inadvertently lined up with Runway 10L, which runs parallel to their assigned runway.
Air Traffic Control Deficiencies
While the primary error originated in the cockpit, the NTSB assigned significant weight to the failure of Air Traffic Control to intervene. The approach controller observed that Envoy flight 3936 was aligned with Runway 10L rather than the assigned 10C.
Under Federal Aviation Administration (FAA) directives, controllers are required to notify pilots immediately if they observe an aircraft aligning with a wrong surface. However, in this instance, the controller did not issue a safety alert or order a go-around. Instead, the approach controller coordinated with the tower controller responsible for Runway 10L to ensure the strip was clear, effectively allowing the error to proceed to a landing.
The NTSB described this decision as “deficient,” noting that it bypassed critical Safety layers designed to prevent collisions.
“Air traffic control’s failure to notify the flight crew that they were lined up with the incorrect runway contrary to FAA directives.”
Probable Cause and Safety Findings
The Board’s final report formally identifies the probable cause of the incident as the crew’s failure to identify the correct runway, driven by psychological biases.
“The flight crew’s misidentification of the intended landing runway, which resulted in an approach to and landing on the wrong runway due to their planned continuation bias.”
The report emphasizes “plan continuation bias”, a phenomenon where pilots continue with an original plan (landing) despite emerging cues that suggest the plan is no longer safe or valid (such as the failure to receive positive ILS guidance). The NTSB also reiterated that wrong-surface landings remain a “top 5” safety focus for the FAA, noting that while this specific incident ended without damage, similar errors have historically led to near-misses and catastrophic collisions.
AirPro News Analysis
This incident serves as a textbook example of how “Swiss Cheese” failure models manifest in modern Aviation. While the pilots made the initial errors, mis-tuning a radio and visually misidentifying a runway, the safety net that is supposed to catch these errors also failed. The ATC decision to silently accommodate the wrong runway landing rather than correct it suggests a potential normalization of deviance in busy terminal environments.
Furthermore, the “expectation bias” noted by the NTSB highlights the vulnerability of human performance during high-workload phases of flight. When runway assignments change four times in a short window, the mental model of the arrival becomes fragmented. For operators, this underscores the importance of “stopping the line”, or initiating a go-around, when automation (like the ILS autotune) behaves unexpectedly, rather than attempting manual workarounds at low altitudes.
Sources
Sources: NTSB Final Report (ID 195210)
Photo Credit: NTSB
Regulations & Safety
Emergency Landing of Vintage Plane on Busy Phoenix Street Investigated
A Republic RC-3 Seabee made an emergency landing on a Phoenix street after engine failure; FAA and NTSB investigate with no serious injuries reported.
This article summarizes reporting by 12News and local Phoenix authorities.
A vintage amphibious aircraft made a highly unusual emergency landing on a busy central phoenix street on Sunday afternoon. According to reporting by 12News, the incident occurred near the intersection of 7th Street and Missouri Avenue, bringing traffic to a halt but miraculously resulting in no serious casualties.
Despite descending into a densely populated urban corridor, the pilot successfully avoided vehicles, pedestrians, and surrounding buildings. All three occupants on board the small aircraft walked away with only minor injuries, refusing transportation to a local hospital after being evaluated by emergency crews.
The Federal Aviation Administration (FAA) and the National Transportation Safety Board (NTSB) have launched official investigations into the mid-flight engine failure that prompted the sudden urban landing.
The Incident and Immediate Aftermath
The emergency landing took place at approximately 2:37 p.m. local time on Sunday, April 12, 2026. Flight tracking data and local reports indicate the aircraft experienced severe engine problems mid-flight, forcing the pilot to navigate the plane down into the active traffic lanes of 7th Street.
While the aircraft managed to dodge power lines and civilian vehicles, it did strike a shut-off fire hydrant during the landing sequence. According to the Phoenix Fire Department, this collision ruptured a water main, causing localized flooding that city crews were immediately dispatched to resolve.
Eyewitness and Official Reactions
First responders and bystanders alike expressed shock at the successful outcome of the forced landing in such a bustling area, which is typically crowded with cars, cyclists, and pedestrians.
Captain D.J. Lee of the Phoenix Fire Department described the landing as “100% a miracle” and “remarkable,” crediting the pilot’s extensive experience for avoiding a disaster.
Witnesses on the ground echoed this sentiment. One bystander recounted watching the plane fall in what felt like slow motion, expressing disbelief that the aircraft landed perfectly without injuring anyone on the ground. Another witness who rushed to the scene to check on the occupants noted that everyone appeared completely fine following the impact.
Aircraft Details and Pilot Experience
The aircraft involved in the incident has been identified as a privately-owned Republic RC-3 Seabee, bearing the tail number N6518K. According to historical data from the Smithsonian National Air and Space Museum, the Seabee is a four-seat amphibious plane introduced shortly after World War II, originally designed to operate on both land and water.
Local authorities reported that the flight originated from Hangar Haciendas Airpark, a private residential airpark located in Laveen, southwest of Phoenix.
Decades of Aviation Experience
Authorities highlighted that the pilot possesses 40 years of aviation experience. This extensive background was cited by emergency responders as a critical factor in the successful navigation of the vintage aircraft. The pilot’s ability to find a clear pocket on a busy city street prevented what could have been a catastrophic urban accident.
Ongoing Investigations
Following the crash, authorities closed 7th Street between Missouri Avenue and Coulter Street for several hours. This closure allowed emergency responders to secure the scene, repair the ruptured water main, and permit federal investigators to begin their preliminary assessments.
Both the FAA and the NTSB are actively probing the incident. The NTSB has indicated that a preliminary report detailing the exact circumstances of the engine failure will be released within 30 days.
AirPro News analysis
At AirPro News, we note that emergency landings in densely populated urban environments are exceedingly rare and carry a high risk of mass casualties and infrastructure damage. The successful outcome of this event underscores the paramount importance of rigorous pilot training and situational awareness. Furthermore, the involvement of a vintage post-WWII aircraft like the Republic RC-3 Seabee adds a unique layer of complexity to the upcoming NTSB investigation, as maintenance protocols and parts sourcing for such historical airframes differ significantly from modern general aviation aircraft.
Frequently Asked Questions (FAQ)
Were there any injuries in the Phoenix plane crash?
The three people on board the aircraft sustained minor injuries and were evaluated at the scene, but they refused hospital transport. No pedestrians or drivers on the ground were injured.
What type of plane landed on 7th Street?
The aircraft was a Republic RC-3 Seabee, a vintage four-seat amphibious plane introduced shortly after World War II.
What caused the emergency landing?
Preliminary reports from local authorities indicate the aircraft suffered mid-flight engine problems, forcing the pilot to make an emergency landing. The NTSB is currently investigating the exact cause.
Sources
Photo Credit: X
Regulations & Safety
FAA to Transition to Modern NOTAM Management Service on April 18
FAA will replace the legacy US NOTAM System with the NOTAM Management Service on April 18, improving safety alert infrastructure and ensuring continuous access during the switch.
This article is based on an official press release from NBAA.
The Federal Aviation Administration (FAA) is preparing to shut down its legacy US NOTAM System (USNS) and transition to the modernized NOTAM Management Service (NMS) on Saturday, April 18. The cutover marks a significant milestone in the agency’s ongoing efforts to overhaul the critical safety alert infrastructure used by pilots and air traffic controllers.
Scheduled to take place between midnight and 4 a.m. EDT, the transition is designed to be seamless for the aviation community. According to an official press release from the National Business Aviation Association (NBAA), the FAA has structured the maintenance window to ensure continuous access to vital flight information.
The upgrade follows years of development, which were heavily accelerated after a major system failure in early 2023 highlighted the fragility of the aging USNS architecture.
The April 18 Cutover Process
Maintaining Access During the Transition
During the four-hour maintenance window on April 18, any NOTAMs that were active prior to the shutdown will remain accessible through all normal distribution channels. To ensure operators receive the most accurate and timely information, the FAA recommends utilizing the FNS NOTAM search tool during this period.
Once the clock strikes 4 a.m. EDT, the new system will officially take over. From that point forward, NOTAMs obtained through the FNS page and third-party providers will be routed directly through the NMS. Despite the backend overhaul, the NBAA notes that operators should not notice any immediate differences in how they receive data.
“The cutover and transition are expected to be completely transparent to operators. We don’t anticipate hiccups.”
Addressing Past Vulnerabilities
The 2023 Outage Catalyst
While the FAA has been working to upgrade the NOTAM system for several years, the urgency of the project increased dramatically following a severe system outage in January 2023. That incident grounded morning departures for 90 minutes across the entire National Airspace System, exposing critical vulnerabilities in the legacy framework.
Launched in early 2025, the development of the NMS focused on performance-based solutions rather than just a broad technical overhaul. The FAA actively solicited user feedback to identify and resolve specific pain points within the system.
Future Capabilities and Formatting
Although NOTAMs will continue to be presented in their current, traditional format immediately following the NMS cutover, the new infrastructure lays the groundwork for future improvements. According to the NBAA, the upgraded system offers the capability to eventually present NOTAMs in a more accessible, easier-to-understand layout.
“Ultimately, these changes are for the good of the system, because we need redundancy and resiliency. That is what the NMS provides above all else.”
AirPro News analysis
The transition to the NOTAM Management Service represents a critical shift from reactive patching to proactive infrastructure management for the FAA. The January 2023 ground stop served as a wake-up call for the aviation industry, demonstrating the catastrophic potential of a single point of failure in legacy systems. By prioritizing redundancy and resiliency, the NMS should provide a much-needed safety net. Furthermore, while pilots have long complained about the cryptic and outdated formatting of NOTAMs, establishing a robust backend is the necessary first step before the FAA can roll out the modernized, plain-language layouts that the industry has been requesting for decades.
Frequently Asked Questions
When will the FAA switch to the new NOTAM system?
The transition from the USNS to the new NMS will occur on Saturday, April 18, between midnight and 4 a.m. EDT.
Will pilots lose access to NOTAMs during the transition?
No. According to the FAA, NOTAMs active prior to the maintenance window will remain available via normal distribution channels, and the agency recommends using the FNS NOTAM search tool during the cutover.
Will the format of NOTAMs change on April 18?
Not immediately. NOTAMs will continue to be presented in their current format, but the new NMS infrastructure will allow for easier-to-understand layouts in the future.
Sources
Photo Credit: NBAA
Regulations & Safety
ICAO GISS 2026 to be Held in Marrakech, Morocco, Advancing Sustainable Aviation
ICAO will host GISS 2026 in Marrakech, Morocco, focusing on sustainable aviation and supporting global implementation of safety and environmental standards.
This article is based on an official press release from ICAO GISS 2026.
The International Civil Aviation Organization (ICAO) is set to convene the global aviation community in Marrakech, Morocco, for the Global Implementation Support Symposium (GISS) 2026. Scheduled to take place from April 14 to 16, 2026, at The Palmeraie Conference Centre, the event marks a significant milestone as Morocco becomes the first African nation to host the symposium.
According to the official event website, GISS 2026 will serve as a critical platform for fostering collaboration, driving progress, and shaping the future of international flight. The symposium aims to bring together a diverse group of stakeholders, including government ministries, civil aviation authorities, industry leaders, and financial institutions, to strengthen aviation systems worldwide.
Advancing the “No Country Left Behind” Initiative
Focus on Sustainable Aviation
A central theme of the upcoming symposium is the promotion of Sustainable Aviation, directly aligning with ICAO’s “No Country Left Behind” initiative. This global effort seeks to ensure that all 193 member states have the support needed to implement ICAO’s safety, security, and environmental standards, regardless of their current level of economic development.
The official press release highlights that the event will provide opportunities for attendees to connect with peers and explore actionable ways to strengthen aviation implementation efforts. By reducing implementation gaps between developed and developing nations, ICAO aims to build a more resilient and efficient global air transport network.
Morocco’s Strategic Role as Host
Infrastructure and Regional Connectivity
Morocco’s selection as the host for GISS 2026 underscores its growing prominence as a regional and international aviation hub. Strategically located at the crossroads of Europe and Africa, the country offers a unique blend of modern infrastructure and dynamic growth.
In a statement regarding the event published by Uniting Aviation, Abdessamad Kayouh, Morocco’s Minister of Transport and Logistics, emphasized the country’s commitment to global civil aviation. The symposium aligns with Morocco’s strategic vision to enhance air connectivity, promote sustainability, and deepen international cooperation. Furthermore, according to reporting by Morocco World News, Morocco is actively expanding its Airports capacity, targeting an increase from 40 million to 80 million passengers by 2030.
“We warmly welcome all participants to the Symposium. We are honoured to bring together such a diverse group of experts and leaders,” stated the official welcome remarks from ICAO Secretary General Juan Carlos Salazar and Minister Kayouh.
AirPro News analysis
We view the decision to host GISS 2026 in Marrakech as a strong signal of Africa’s rising importance in the global aviation sector. As the continent experiences rapid growth in air traffic demand, ensuring that African nations can meet and maintain ICAO standards is crucial for global safety and connectivity. Morocco’s proactive Investments in airport infrastructure and high-speed rail networks position it as a model for regional development. This symposium will likely catalyze further investments and Partnerships aimed at modernizing air transport systems across the African continent and beyond.
Frequently Asked Questions
When and where is ICAO GISS 2026 taking place?
The symposium will be held from April 14 to 16, 2026, at The Palmeraie Conference Centre in Marrakech, Morocco.
Who is attending the symposium?
According to the event organizers, the symposium is open to government ministries, civil aviation authorities, international organizations, aviation industry representatives, service providers, and financial institutions.
What is the main goal of the event?
The primary objective is to promote sustainable aviation and strengthen global implementation efforts in line with ICAO’s “No Country Left Behind” initiative.
Sources
Photo Credit: ICAO
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