Wonderful chaps in their own way, and surely responsible for more than one prevention of error by the pilots.
And then again, on December 4th 1974.......
While on a night flight operating as BA910 from Hong Kong to Tokyo, somewhere over the South China Sea, G-ASGL suffered a fuel transfer error that caused all four engines to run down. In order to correct an imbalance the Flight Engineer had all four engines feeding from the number 4 main tank, but forgot about the situation. Later on when he was briefly away from his station the main tank ran dry. Initially no.3 engine flamed out, causing the speed to drop towards 250 knots, and the crew reacted by securing the engine. Just as the other power levers were being advanced to check the speed the other three engines also flamed out creating an eerie silence on the flight deck.
Mind you, he did well after that....
As the flameouts caused all the generators to drop off line, the ELRAT (electric ram air turbine) was quickly deployed, restoring electrical power to the flight controls. In the meantime a shaken Flight Engineer had returned to his post and commenced to restart the four engines, so that several minutes later all was back to normal except for the deployed ELRAT.
It's a masterful understatement; "several minutes later all was back to normal" disguises quite a lot of frenetic and extremely skilled activity by the crew as the aircraft descended quite quickly towards the ocean, including overcoming the divergent 45 degree Dutch roll that resulted from loss of the yaw damper after the initial total loss of power. (As I recall it, the F/O suggested using the speedbrake, which worked.)