Aeulad,
You are quite right about the MD 11s - my screw up whilst editing prior to posting.
The line should read:
e.g. AA no longer serves Dallas - Manchester and has reduced a daily MAN-ORD service - which in the 1990s had an MD11 service, twice a day in summer (2nd flight a 767) - to 5 days a week this winter.
BTW the Dallas flight operated for a couple of years and AA also were pressured by BA into dropping MAN - JFK which benefitted CO.