De Havilland planes get new safety rules, but only for the old company

The US aviation regulator is issuing new safety rules for certain De Havilland aircraft. These rules apply to planes built by Bombardier, which previously held the type certificate for these aircraft.

When an aircraft manufacturer sells off a product line, the new owner usually takes on all the responsibilities, including safety directives. This document specifies that the old company, Bombardier, is still responsible for these particular safety issues. This means that even though De Havand now owns the planes, Bombardier still has to deal with the consequences of its past manufacturing.