MC isn't something I'm familiar with Generally in crew airplanes, a multi crew is assumed; single pilot operations in crew aircraft are the rare exception, and one might refer to those as SP (but will generally just say "single pilot" to avoid confusion). I've never heard of anyone refer to standard operations as "MC." Interesting.
Citations the jets I fly are Multi Crew or SP single pilot hence the differentation as not all Citations are Multi Crew. Okay I was being lazy not writing out MULTI CREW and abreviated it to MC
Pace