In my experience at AS
...a D-check was pretty much removal of everything on the a/c. This included structural inspections. Sometimes on a D-check, some things dont get removed. These checks lasts anywhere between 30-60 days. I remember doing a D-Check on N767AS back in 1998 and it was a 60 day check..it was BORING!!!
Disclaimer....I was a Technician Helper with AS
at that time, so things that AS
are done differently now, I think....
A Safe Flight Begins With Quality Maintenance On The Ground.