In the TESTED acronym, what does Ext devices stand for?

• A. Exterior devices (Correct)
• B. Extraction devices
• C. External devices
• D. Extinguishing devices

Answer: (A)

Ext devices refers to exterior devices—the equipment and features on the outside of the aircraft. In the TESTED framework, you consider items such as antennas, external fittings, and other external features, along with any damage or misalignment observed on the airframe’s exterior, because these can influence aerodynamics, stability, and structural behavior and help reveal pre- or post-impact conditions. The other options don’t fit the established mnemonic: extraction devices are for rescue tools, external devices is not the standard wording used in this acronym, and extinguishing devices relate to fire suppression rather than to exterior components being evaluated in the investigation.