PlaneTruth...there were not 2 jumpseaters on board that UAL 744 flight, they were F/Os assigned to the trip as "International Relief Officers", or as UAL calls them---"bunkies". UAL normally assigns 1 Captain and 3 F/Os to their long-haul 744 flights (over 12 hours). These 2 pilots sitting on the jumpseats were members of the crew and rightfully spoke up during the GPWS terrain warning and subsequent stick-shaker activation. They helped save the aircraft, and are to be commended. For some reason, the Captain just sat there, until the airplane was under control and climbing away from the hills.
Any company with long-haul flights that staff relief pilots can learn from this incident. Pilots that never fly and have to re-qualify in the simulator are obviously rusty and over time lose their proficiency in skills such as engine-out climb.
Also, you referred earlier to the Air France A320 accident at Habshiem, in 1988, as a revenue flight. Not true. It was a fly-past for demonstration purposes to show off the new Airbus, and obviously resulted in a fatal accident. 3 fatalities and 27 injured, but all onboard were joyriding for the fly-past at the airshow.