in advance to my BA LHR-YYZ trip this month I checked the registration numbers at http://www.caa.co.uk/ginfo
Now I'm wondering about one thing:
BA got 747-400s between 1989 and 1999. All aircraft have an MTOW of around 396000 except the aircrafts build in 95 and 96. These planes have an MTOW of just 381000.
What is different with them?