Learn from failures
Engineering Failure Case Studies
Documented engineering failures, summarized from the official investigations. Each case separates what the record shows from a short exercise you can apply to your own review process.
See the case studiesCivil & Structural
Tacoma Narrows Bridge, 1940: Wind and a Slender Deck
The Tacoma Narrows Bridge collapsed in November 1940, four months after it opened. What the investigators concluded about wind, slenderness and what designers changed.
Hyatt Regency Kansas City Walkways, 1981: A Connection Detail Changed During Construction
The National Bureau of Standards found that the walkways failed at the box beam-hanger rod connections, and that a change in hanger rod arrangement during construction roughly doubled the load on them.
Chemical & Process
BP Texas City Refinery, 2005: A Tower Overfilled and Trailers in the Wrong Place
A distillation tower flooded with hydrocarbons during start-up and released a geyser from the vent stack. Fifteen workers died, many in trailers close to the release.
Imperial Sugar Refinery, 2008: A Dust Explosion Fueled by Accumulations
A huge explosion and fire at a Georgia sugar refinery killed 14 people. The CSB found that massive accumulations of combustible sugar dust fueled it.
Buncefield Oil Storage Depot, 2005: A Massive Explosion and a Tank-Overfill Lesson
Explosions and a large fire destroyed most of the Buncefield depot in England. The UK investigation led to major changes in fuel-storage safety standards and to convictions against five companies.
Aerospace & Space
Mars Climate Orbiter: When Units Become an Interface Failure
NASA lost the Mars Climate Orbiter in 1999 after software produced a value in one unit while the receiving software expected another. What the investigation found, and a review exercise.
Space Shuttle Challenger, 1986: A Joint Seal and a Launch Decision
The Presidential Commission found that the loss of Challenger was caused by the failure of the seals in a joint of the right Solid Rocket Motor, and that the launch decision process had a serious flaw.
Space Shuttle Columbia, 2003: A Foam Strike and Organizational Causes
The Columbia Accident Investigation Board traced the loss of the orbiter to foam that struck the left wing during launch, and gave the organizational causes as much weight as the physical one.
Alaska Airlines Flight 1282, 2024: A Door Plug and a Parts-Removal Process
The NTSB found that a door plug separated in flight because the bolts securing it were not reinstalled after manufacturing rework, and that training, guidance, oversight and regulatory surveillance all fell short.
How these pages work
What happened
A short account taken from the investigation record.
What was found
The causes the investigators identified, with sources.
Apply it
An exercise that turns the lesson into a review habit.
Questions
Where do the facts come from?
Each case links to its official investigation or lessons-learned record. Where a number is an illustration, the page says so.
Do these cases assign blame?
No. They describe the findings and the process lessons.
Educational material. Examples use simplified, hypothetical inputs and are not a design, a construction document or professional engineering advice. Confirm requirements with the codes and standards adopted where the work is built and with a licensed engineer.
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