A 7% rate ?Bombardier has a B2 Stable rating ( B for S&P). There's no magic, even with a B+ the rate would be, at least, around 7 % ( 6,75%-7,25%) for a 7 years bond.
The goal is to address the huge level of terms of 2026 ( 1,2 B$) and 2027 (1,9B$).
I understand that the market appetite has limits and making offers by 500M$ slices regularly they would have better conditions than a massive refinancing 2 years ahead.