Sorry mate, you've screwed the pooch this time. There were three pilots in the cockpit of that aircraft on that flight. (Plus the two children, who were travelling with their father, one of the three pilots.) Don't take my word for it, look it up, Aeroflot Flight 593.
Sadly, you haven't got the number of pilots normally required in old-time western aircraft right either. Up until about 1970, give or take, it was indeed common to have three crew members in the cockpit as routine, but onlt two of them pilots. The third member was the Flight Engineer, who was usually responsible for (obviously) the engines, but also other tasks, notably fuel management. Advances in technology soon made flight engineers technically superfluous, but airlines in some countries retained them for another decade or so largely because of pressure from their union.
Flight Engineers were not pilots, and were not qualified or trained to fly the aircraft, although of course some engineers did flying training at their own expense in the hope of eventually getting a better-paid and more prestigious job at the pointy end.
On very long flights, it was and still is cvommon to have a third pilot, or more typically a complete second crew, to allow the primary crew to get some sleep.