NTSB Releases Frame-by-Frame Images Showing UPS MD-11 Engine Separation in Louisville Crash
The NTSB released frame-by-frame airport surveillance images showing the left engine and pylon separating from a UPS MD-11F after rotation — evidence central to the probe of the November 4, 2025 Louisville crash that killed 14 and injured 23.
Key takeaways
- Visual evidence: Security-camera frames show the left engine and pylon breaking away and arcing over the fuselage.
- Preliminary cause: Early NTSB work points to long-term fatigue cracks in the left engine pylon.
- Consequences: All three crewmembers and 11 people on the ground died; 23 people on the ground were injured.
- Ongoing work: Metallurgical testing, component tests, and maintenance-record reviews are continuing.
Frame-by-frame imagery shows engine and pylon separation
The NTSB published airport security camera frames in its preliminary report that depict the MD-11 taking off with the left engine and pylon attached. Moments after rotation the imagery shows the left engine and pylon breaking away, arcing over the top of the fuselage, and striking the ground. The released visuals are available via the NTSB preliminary report and the PDF, and news outlets published frames and clips (see ABC News and the YouTube video).
A burst of fire is visible at the left engine as it separates, indicating ignition at the wing‑pylon attachment point; that fire continued until impact.
NTSB preliminary findings point to fatigue cracks
Investigators emphasize that physical inspection of recovered components shows patterns consistent with long-term metal fatigue rather than a single overstress event. Specifically, part of the wing clevis remained attached to the pylon bearing and a key bearing component was fractured — findings summarized in the NTSB preliminary report and discussed by industry outlets such as Flying Magazine and FreightWaves.
Flight data and aircraft motion after separation
Flight data show that after the left engine and pylon separated the MD-11 briefly climbed to about 30 feet above the runway, then lost lift and control and descended rapidly to the ground. Investigators found fan‑blade fragments from the left engine scattered along the runway; the right engine remained attached until impact (coverage by AVweb and Flying Magazine).
What investigators are still examining
The NTSB continues component testing, metallurgical analysis, and a review of maintenance and inspection records to determine the age, progression, and detectability of the fatigue cracks. Key questions include:
- How long had the cracks been growing?
- Could routine inspections have identified the damage?
- Do existing inspection rules adequately address pylon fatigue on older freighters?
Regulators, airlines, and maintenance providers will be scrutinized for whether inspections, parts life limits, or service bulletins were followed and whether they were adequate (see the NTSB PDF for details).
Industry context: aging fleet, cargo needs, and safety oversight
The MD-11 remains a workhorse for many cargo fleets. The investigation highlights the tension between operating older aircraft to meet freight demand and ensuring structural integrity after decades of service. Inspectors often use visual checks and non‑destructive testing, but fatigue can form in hard‑to‑see areas like pylon attachments (Flying Magazine; AVweb).
Visual evidence’s role in reconstruction
The frame-by-frame images and surveillance video let investigators sequence the breakup in real time and correlate the visuals with flight recorder data and recovered parts. The footage has become central evidence supporting the NTSB’s early conclusion that metal fatigue played a significant role (see ABC News and the released video).
Accountability and next steps for regulators and operators
Preliminary reports do not assign blame, but NTSB findings commonly lead to recommendations for the FAA and industry. Possible outcomes include airworthiness directives, new inspection techniques, or revised service‑life limits for affected components. Given the casualties in Louisville, state and local leaders are likely to press for timely fixes.
Implications for Utah
Utah hosts major cargo and logistics operations that rely on air freight. Potential impacts include slower deliveries, higher costs, and increased demand for maintenance and non‑destructive testing. Local businesses, training programs, and policymakers should monitor any FAA action and carrier communications.
