...
Manufacturer names are tied to specific countries (on Y50), and frequently, models (on y61, y62) are discovered to be assigned under a manufacturer for the wrong country since many of the SAME manufacturing companies operate out of multiple countries.
see PBI -123197
Duplication of this type is normally accounted for on the manufacturer table by suffixing Manufacturers with country designations (example : PRATT & WHITNEY - CAN , PRATT & WHITNEY - USA )see PBI -123197, DEHAVILLAND - CAN, DEHAVILLAND - AU, DEHAVILLAND - UK)
###########
This is not to be confused with instances where models are “aliased”
(ie: 2 or more manufacturers are assigned to a given model, having equivalent type-approval codes)
Aliases are a result of lineage, whereby the Type-approval for a given model, is passed from one company to another over the decades.
...
This article is only meant to describe a situation where a model was found allocated to the wrong manufacturer, from day 1, and needs to be moved
...