Senate aviation subcommittee probes DCA midair collision; NTSB calls for Route 4 restrictions and FAA moves to require ADS‑B out at Reagan National

The Subcommittee on Aviation and Space of the Senate Commerce Committee held a hearing to review the National Transportation Safety Board's preliminary report on the Jan. 29 midair collision over the Potomac River near Ronald Reagan Washington National Airport that killed 67 people.

The NTSB’s preliminary report and supporting FAA data showed thousands of close‑proximity events between helicopters and commercial aircraft at DCA, and the board recommended immediate restrictions on a portion of Helicopter Route 4. The hearing focused on why the risks were not addressed earlier, what the agencies have done since the collision, and what additional steps Congress or the agencies should take to prevent a recurrence.

NTSB Chair Jennifer Homendy told the subcommittee that NTSB analysis of FAA surveillance data covering October 2021 through December 2024 found more than 15,000 close‑proximity events between helicopters and commercial aircraft at DCA and 85 events during that period in which vertical separation was less than 200 feet. She said the agency determined that separation on Route 4 between Haines Point and the Wilson Bridge is “insufficient and pose[s] an intolerable risk to aviation safety” and recommended the FAA prohibit operations on that segment when Runways 15 or 33 are used for arrivals or departures. Homendy also said the NTSB issued two urgent safety recommendations and that the preliminary report — released March 11 — contains factual information but not final analysis or probable cause.

Acting FAA Administrator Chris Rocheleau described steps the agency has taken in response to the NTSB recommendations and its own review. Rocheleau said the FAA has made permanent restrictions limiting mixed helicopter and fixed‑wing traffic in the affected DCA airspace and will require all aircraft operating in DCA Class B airspace to broadcast position and identification via ADS‑B out with only very limited exceptions. He said the FAA is analyzing other airports with established helicopter routes near airplane traffic and will establish a safety risk management panel and additional stakeholder engagement. “Aviation safety is the FAA’s number 1 priority,” Rocheleau said.

Brig. Gen. Matthew Brahman, director of Army Aviation, said the Army paused the twelfth Aviation Battalion’s flights immediately after the accident and has since limited operations near DCA, flying only outside a 7‑nautical‑mile radius of Reagan National except for missions carrying the secretary of defense or the chairman of the Joint Chiefs. He said the Army is participating in an FAA‑led working group to redesign Route 4, has elevated internal approval authority for flights operating with ADS‑B off, and that the specific status and functionality of the Black Hawk’s ADS‑B in/out equipment remain under investigation by the NTSB.

Senators pressed witnesses on why the FAA data indicating a high frequency of close‑proximity events did not lead to earlier rule changes. Sen. Tammy Duckworth, a former Black Hawk pilot, said the warnings had been clear and cited prior hearings that raised staffing and technology concerns. Sen. Maria Cantwell cited a NTSB figure of 15,214 instances in a three‑year period when aircraft and helicopters came within 400 feet, and asked why those data did not trigger changes. Sen. Ted Cruz said the crash was preventable and emphasized congressional responsibility to fix policy failures. Chairman Jerry Moran praised NTSB’s transparency and urged both deliberate congressional oversight and implementation of recommended changes.

Witnesses described technical and policy issues under review: whether the Army helicopter was transmitting ADS‑B out at the time of the collision (NTSB is still investigating equipment status and whether the system was turned off or malfunctioning); discrepancies in altitude readings recorded by the helicopter crew; how helicopter routes were authorized and deconflicted with runway approaches; and the role of air traffic controller assignments and workload. Homendy said NTSB investigators are examining air traffic control, human performance, aircraft airworthiness, and flight recorder data and aim to complete the investigation within about one year, barring unforeseen circumstances.

Committee members and witnesses also discussed non‑DCA incidents and broader system pressures: previous hearings and GAO reports cited aging air traffic control systems, staffing shortages, and recurring NOTAM system failures. Rocheleau described efforts to hire and train controllers and to accelerate modernization, including incentives for FAA Academy attendance.

The hearing produced immediate operational directions rather than formal congressional votes. The FAA implemented permanent restrictions in DCA airspace consistent with the NTSB’s urgent recommendations; the Army temporarily paused and restricted some flights and raised approval authority for ADS‑B‑off operations; the FAA said it will require ADS‑B out in DCA Class B airspace with limited exceptions, study other airports with similar mixed traffic, convene a safety risk management panel, and pursue additional hiring for air traffic controllers. The NTSB’s final report, with analysis and probable cause determinations, is expected later after the full investigation is complete.

The subcommittee said it will continue oversight as the investigations proceed and as the FAA and military implement operational changes. The hearing included extensive questioning from senators and statements of condolence to the families of the victims; no formal votes or legislation were decided at the session.