Why Electric Aircraft Crashes Demand New Accident Investigation Methods
Electric aircraft are introducing new challenges for accident investigators that extend beyond traditional aviation safety risks. While electric aircraft remain vulnerable to familiar accident causes such as loss of control, structural failures, and operational errors, investigators must now also evaluate the role of high-voltage battery systems, software integration, automation, and complex electrical architectures.
As electric aviation technology develops, accident investigation agencies are adapting their procedures to address risks that may remain present long after an aircraft has come to rest. From thermal runaway and electrical hazards to software failures and automation issues, future investigations will require new technical expertise alongside traditional accident-investigation methods.
Published: 18 September 2026
Written by: Shashwat Dwivedi
Aircraft accidents, as unfortunate as they are, come with a degree of familiarity for investigators built upon decades of experience dealing with fuel, fire, structural damage, and wreckage analysis. Electric aircraft, however, represent relatively new territory and require investigators to develop new procedures and expertise.
Traditional risks associated with flying do not disappear if it happens to be an electric aircraft. It can still lose control, suffer structural failures or make hard landings. What is changing is the number of ways propulsion, software, automation and flight controls can interact.
MDPI’s latest Safety Journal examined the case of the SwitchMaster crash, a 2.1-metre research aircraft fitted with six electrically powered propellers. During an automated flight-test manoeuvre, asymmetric trim was accepted before the control surfaces were temporarily fixed for an open-loop test. The aircraft entered an uncommanded roll, while a kill switch failed after its software mapping had been lost during a firmware update. Manual control returned too late for the available altitude. Fortunately no one was injured.
The report in the journal noted that “the entire upset sequence developed over only a few seconds.” It did not describe the accident as being caused by a single dramatic failure but rather as a series of weakened safety barriers involving automation, software configuration, trim validation and delayed recovery authority.
A battery fire was not the cause of the accident, despite the common perception that battery-related fires represent the primary risk associated with electric aircraft. Electric aircraft require new assumptions and safeguards.
Aviation Week reported that the UK Air Accidents Investigation Branch (AAIB) has warned that electric-aircraft batteries pose “a clear and present risk” to investigators examining wreckage. The AAIB says aviation propulsion batteries commonly operate at 350 to 400 volts, while some can reach 800 volts. Those voltages can be lethal and generate enough heat to melt metals and alloys.
Impact damage, overheating, or short circuits can trigger thermal runaway, producing intense heat, flames and gases. Crucially, the reaction may be delayed. A battery that initially appears stable can ignite after responders move the wreckage or disturb damaged cells. Metallic and carbon-composite structures may also become electrically live under certain circumstances if damaged.
When comparing the scenarios with a conventional aircraft, the AAIB notes that draining fuel is a common method to avoid triggering a fire near the wreckage, "this is not an option with an electric aircraft." The battery is not only evidence to be preserved but also a source of danger.
The advent of electric aircraft also demands that conventional investigation methods be adapted.” The AAIB is developing procedures involving thermal imaging, electrically safe protective equipment, insulated tools, remote inspection and the earthing of metallic or composite structures. Investigators will also need detailed manufacturer information about battery architecture, isolation systems and monitoring logic. Electric aircraft are often associated with cleaner, quieter, and more environmentally friendly aviation. However, following an accident, they may present hazards and are capable of causing further damage long after it has stopped moving.
Key Facts
Electric aircraft retain traditional aviation risks while introducing new interactions between propulsion, software, automation, and flight-control systems.
The SwitchMaster research-aircraft accident demonstrated how multiple weakened safety barriers can combine to create an accident sequence within seconds.
The accident involved issues relating to software configuration, trim settings, automation, and delayed restoration of manual control.
Battery fires are not the only concern in electric-aircraft investigations, with software integration and automation failures also requiring scrutiny.
AAIB has warned that high-voltage propulsion batteries pose significant risks to accident investigators.
Some aviation battery systems operate at between 350 and 800 volts, creating potentially lethal electrical hazards.
Damaged batteries can enter thermal runaway and may ignite long after the initial accident.
Unlike conventional aircraft, battery systems remain both a source of evidence and a potential source of danger at crash sites.
Investigation agencies are introducing new procedures involving thermal imaging, insulated equipment, remote inspection, and aircraft grounding techniques.
Future accident investigations will increasingly require expertise in battery systems, software architecture, automation, and electrical safety alongside traditional aviation investigation skills.
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Author: Shashwat Dwivedi Aviation staffing and consultancy insights LinkedIn
