PeterN wrote:
On 5/7/2013 11:07 PM, J. Clarke wrote:
In article ,

Likewise the Lockheed Electra. So much vibration was transmitted into the body
of the plane that at least one airline provided soft cushions for the
passengers' feet. IIRC, they still used them, even after they were required to
reduce the plane's maximum speed by about 100 knots. But after the speed
reduction the planes at least stopped falling apart in the air.

The speed reduction was temporary until the cause of the problem could
be determined. It was determined, it was fixed, and the Electra
airframe continued in production for another 50 years. The vibration
problem was also fixed--the two were not related.

I believe that Lockheed was well aware of the risk, some safety
engineers had warned management, but the warnings were ignored in the
interest of timely delivery.

Sounds like Challenger ...

.... history repeats, it seems, for those who won't learn
from it.

-Wolfgang