Ghosts in the code: the near crash of Qantas flight 72

Qantas flight 72 sits on the tarmac in Learmonth after the emergency landing. Image source: The Daily Mail
The Qantas A330 involved in the accident. Image source: Wikipedia
ADIRU Data Export Format. Image source: the ATSB
How angle of attack is encoded. Image source: the ATSB
How altitude data was encoded as angle of attack. Image source: the ATSB
Examples of checks that failed to catch the bad data. Image source: the ATSB
How the data got past the computer’s comparison check of the ADIRU readings. Image source: the ATSB
The two control mechanisms triggered by the bad AOA data. Image source: the ATSB
Reenactment and simulation of the dive. Video source: Mayday
Emergency services work on the plane after the emergency landing. Image source: news.com.au
Damage to overhead bins and passenger service units. Image source: the ATSB
Damage to the ceiling in the aisles. Image source: the ATSB
A man receives medical attention after the accident. Image source: the Sydney Morning Herald
Damage to the aisle ceiling. Image source: NZHerald
VH-QFA, the aircraft involved in the accident, photographed in 2018. Image source: Masakatsu Ukon

--

--

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store
Admiral Cloudberg

Admiral Cloudberg

Analyzer of plane crashes and author of upcoming book (eventually™). Contact me via @Admiral_Cloudberg on Reddit or by email at kylanddempsey@gmail.com.