AI recreate voices of dead pilots from crash docs, forcing NTSB to suspend public database access

AI Tools Enable Unprecedented Breach of Aviation Privacy Protections

The National Transportation Safety Board has suspended public access to its docket system after discovering that individuals used AI to recreate the voices of dead pilots killed in a cargo plane crash 1

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. The incident involves UPS flight 2976, which crashed on November 4, 2025, in Louisville, Kentucky, killing three crew members and 12 people on the ground when an engine physically detached during takeoff 3

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. Internet users managed to reconstruct the voices of pilots from a spectrogram—a visual representation of sound signals—that the NTSB released as part of its crash investigation materials 2

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The agency announced on May 21 that its online database was "temporarily unavailable" as it reviewed publicly available materials that enabled people to recreate deadly plane crash audio 1

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. Federal law enacted in 1990 explicitly prohibits the NTSB from publicly sharing any part of cockpit audio recordings to protect air crew privacy 1

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. This legislation followed airline pilots' pushback over a controversial TV station airing of cockpit conversation from the August 1988 crash of Delta Air Lines Flight 1141 at Dallas-Fort Worth International Airport.

How Digital Recreations Bypassed Decades-Old Safeguards

The NTSB released written transcripts and a PDF containing a spectrogram showing the last 30 seconds of cockpit audio recording during a two-day investigative hearing held on May 19 and May 20 1

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. That spectrogram enabled multiple individuals to reconstruct audio versions of the pilots' voices and other cockpit sounds, with examples appearing on social media platforms including X and Reddit. One user claimed it took just 10 minutes using OpenAI's Codex to reconstruct rough audio from the spectrogram 1

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The audio re-creations frequently rely on the Griffin-Lim algorithm, originally published in a 1984 paper by Daniel Griffin and Jae Lim 1

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. Updated versions have since been incorporated into speech processing algorithms and implemented through programming languages such as Python, with various implementations available on GitHub. The widespread availability of AI models capable of retrieving necessary information and writing code has made it significantly easier for people to re-create dead pilots' voices from public record materials.

Privacy Concerns Force Agency to Rethink Transparency Practices

Ben Berman, an accident investigator who previously worked for the NTSB and flew a Boeing 737 for United Airlines, expressed shock at the development. "I was shocked to hear about this, because I hadn't imagined that it was possible to do something like this," he told Ars Technica 1

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. He emphasized that privacy protections have been "an important factor for decades in having airline pilots be willing to have their voices recorded at their normal workplace, day in and day out, with the threat of being killed during their workday."

The National Transportation Safety Board restored public access to the docket system on Friday, except for 42 investigations including the one related to Flight 2976, until reviews have been completed 2

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. An NTSB spokesperson told CNN that the agency was unaware that audio could be recreated from a picture, stating they are "looking to make sure there's nothing else in the docket that could compromise anybody's privacy" 4

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What This Means for Aviation Safety and Investigation Transparency

The incident raises critical questions about balancing transparency in crash investigation with privacy protections as AI-generated audio capabilities advance. While the NTSB has historically shared factual reports and evidence to maintain public trust and enable independent analysis, the ability to reconstruct cockpit audio recordings from spectrograms threatens the foundation of pilot cooperation with voice recording systems. The agency takes multiple precautions for securing cockpit voice recorders during investigations, with former NTSB chairman Robert Sumwalt describing how access is restricted to a handful of people who must sign nondisclosure agreements, leave cellphones outside, and destroy handwritten notes afterward 1

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Experts anticipate the NTSB may stop uploading graphic representations of audio in future investigations to prevent similar breaches 3

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. This shift could fundamentally alter how aviation safety information is shared with the public, potentially limiting the depth of publicly available crash investigation materials. The development highlights how rapidly evolving AI capabilities are forcing government agencies to reconsider long-established transparency practices that were designed before such digital recreations became possible within minutes using accessible tools.