4c check
 

could somebody please tell me exactly what this entails. thanks

Aircraft type dependent but briefly take it apart, fix what you find, and put it back together again !

Do you have access to the MPD.

Depending on what type of aircraft, but i would guess fairly major. Half life.

age
 

Entirely depends upon type, age and cycles. for example where i work a 4c on a 20 year old 737 may take up to 20-25 days, wheras on a 5 year old airbus a319/20 will only be 10 days.

Fuselage age & cycles will determine the level of corrosion inspections, NDT checks, lifed component changes etc etc, the list goes on. Even on two identical aircraft the 4c check can be very different.

4C's are easy. Its the 12C's you have to worry about. :E

you should try 20year A300 check

Frame 47 cracks!:}

into service checks on a q400 :{