"The crew faced fire and loss of thrust in the two left-side engines, cabin decompression and, they soon realised, loss of pitch control. For the remainder of the flight they controlled pitch with the aircraft’s trim system. The flight engineer opened the valves to jettison some of the 70 tonnes of fuel the aircraft was carrying for its trans-Atlantic flight, but was disturbed to see that although the solenoid read as open, the fuel level did not fall. At nearly maximum take-off weight but with only two engines operating, the aircraft was in a gradual, but unstoppable, descent."