In a 1992 recorded interview David P. Davies -- chief pilot of the UK Air Registration Board (ARB) from the 1950's through 1970's -- described a problem during certification of a new 707 variant that is remarkably similar to the recent 737MAX issue.
Fascinating full set of interviews at the main site if you have time to listen to them:
https://soundcloud.com/aerosociety-podcast/sets (scroll down to "An Interview With...", and scroll that list for "The D. P. Davies Interview", #'s 19, 18, 17, 16)
Summary: 707-330C variant added leading-edge devices to the wing that caused center of lift to move forward at high Angle of Attack, increasing the pitching moment and reducing the stick forces. Even though the stall behavior was fairly benign, Davies refused to certify it against broad opposition from the airline customers, Boeing, and even his own management in the ARB.
A significant part of his argument was (what I now know as) "Normalization of Deviance". They "solved" it by adding a stick pusher to "nudge" the yoke forward in certain conditions.