This past month, United brought N151UA, a B747-222B (del. 03/19/87) out of storage (in Las Vegas) back to service. I believe this to be one of the 747-200s that flew the JFK-NRT route.
My question is why would they do this? And, why would they put this aircraft (del. 1987) into storage and keep 747s delivered as early as 1970 in service? Am I correct to say that they needed to do this to compensate for the last 3 B747-100s being retired last month?