turbocharged
Spot on. This has happened 100's if not 1000's of times over the years and has been dealt with properly by many embarassed crews. Only once , to my knowledge , was the outcome this disasterous.
Despite many chances to break the chain (maintenance and pilot checklists) this mistake is still being repeated. Where it really went off the rails in this case , was the crews failure to identify the problem. In my opinion the shared warning horn has the potential to confuse a crew as it seems it did in this case.
We are probably lucky this has'nt ended up this way more often than it has.