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NTSB Issues Final Report on Fatal CL604 Crash

NTSB Releases Final Report on Fatal Bombardier Challenger 604 Crash
The National Transportation Safety Board (NTSB) has published its conclusive report on the 2024 crash of a Bombardier Challenger 604 on a Florida freeway, identifying extensive engine corrosion as the primary cause. The tragic accident resulted in the deaths of the pilot and copilot, who succumbed to a post-crash fire. Meanwhile, the cabin attendant and two passengers escaped with minor injuries by exiting through the baggage compartment door. Additionally, a motorist on the interstate sustained slight injuries when the aircraft descended during rush hour traffic.
Engine Corrosion and Mechanical Failures
The 21-page NTSB report details significant corrosion found in the variable geometry (VG) systems of both General Electric CF34-3B engines. This system, responsible for regulating airflow through the high-pressure compressor (HPC) by adjusting the inlet guide vanes and the first five stages of stator vanes, was severely compromised. The corrosion obstructed airflow, leading to compressor stalls and a subsequent loss of engine power.
Investigators recovered the engines and transported them to GE facilities for thorough disassembly and examination under federal supervision. The inspection revealed pronounced corrosion in the VG stage 5 area and the HPC case VG stage 5 stator vane spindle bores. This deterioration restricted the movement of the VG stage 5 stator vanes, slowed system responsiveness, and prevented the vanes from achieving their full operational range as outlined in maintenance manuals. Chemical analyses of the corrosion and debris identified corroded steel and elements typically associated with seawater exposure.
Further findings indicated corrosion along the compressor case inner diameter and within the HPC vane bores of both engines. The compressor cases, constructed from stainless steel, exhibited signs of degradation consistent with prolonged exposure to corrosive environments. At the time of the accident, the aircraft was operated by Ace Aviation Services, trading as Hop-A-Jet, and was based at Fort Lauderdale Executive Airport (KFXE), located approximately four nautical miles from the Atlantic Ocean. Notably, the aircraft had previously been stationed in Barbados since its delivery in 2004.
Additional Factors and Industry Implications
Beyond mechanical issues, the NTSB report identified pilot judgment error concerning hail damage as a contributing factor. The investigation referenced a prior incident on January 14, 2024, when the jet experienced a “hung start,” an abnormal engine start characterized by failure to accelerate to idle speed. Maintenance personnel conducted fuel contamination tests following this event but found no evidence of contamination.
The NTSB’s findings are anticipated to prompt heightened scrutiny of engine maintenance and inspection protocols throughout the aviation industry. The report underscores potential safety risks associated with business jets, particularly regarding corrosion in critical engine components. In response, industry competitors may intensify safety measures and highlight aircraft reliability in forthcoming marketing efforts.
This crash serves as a stark reminder of the vital importance of rigorous engine inspection and maintenance, especially for aircraft operating in coastal regions where exposure to corrosive elements is elevated.

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