TAM Transportes Aéreos Regionais Flight 402

Introduction
TAM Transportes Aéreos Regionais Flight 402 was a passenger flight from São Paulo to Recife, Brazil with a stop in Rio de Janeiro. The plane crashed into a residential area in São Paulo shortly after take-off.

Pilots
Captain José Antonio Moreno and First Officer Ricardo Luis Gomes flew the short flight, and it was found that First Officer Gomes was partly at fault for the accident.

The Crash
The plane lifts off from the runway, but First Officer Gomes spots a problem. The right engine has suddenly moved itself down to a lower setting. Gomes pushes it back up to full power, but it moves back down again. He is told by Captain Moreno to turn the auto-throttle off as that was probably the issue, and Gomes does so. He then pushes the engine lever up to full power, but he has to use all of his strength to do so. He holds it there, but the aircraft begins to roll harshly to the right. The crew, now trying to recover, attempt to correct the bank, but are unsuccessful. The plane smashes into a populated housing area in São Paulo, killing everyone on board and another 4 on the ground. But what caused such a strange accident?

Cause
It was found that First Officer Gomes' fighting with the right engine was unsurprisingly the cause. It was found that a short circuit in the system caused the right thrust reverser to open. The flight crew were not alerted of the engine's state, which could have saved the lives of everyone on board. The movement of the engine lever was the plane trying to stop the thrust reverser from continuing to be deployed, but the First Officer's movements were stopping this. But the system in the Fokker 100 is supposed to take large quantities of force, so how could First Officer Gomes successfully fight back?

After further examination, it was found that the pressure of the system trying to move the engine lever and First Officer Gomes pushing in the opposite direction was enough to destroy the control system completely, allowing for Gomes' movements to be accepted. It was also found that Fokker told buyers to not train for this situation, as it was extremely rare.