What are " Phase inspections"?

Question

For civilian pistion aircraft, I know about the Annual Inspection. Ive noticed in some literature for Jet aircraft and some pressurized/turbo AC the requirement for "Phase Inspections" (sometimes A-G) Im pretty sure this relates to the number of cycles (landing gear) or landings or maybe the number of flights. Does anyone know the exact meaning of "phase inspections" as they relate to say....small twin-jets like the Citation or Hawker 400?

thanks

Answer 1

Since I  am no Gen Av guy i can only relate to you on narrow & wide body aircraft. Phase Inspections -are scheduled inspections intervals set forth as a guide by aircraft manufacturer to check the airworthiness of the aircraft in their usage. Example A320

"A" Check - Every 600 FH (flying.hours) or

                                750 FC (Flight cycles) or

                                100 Days whichever comes first.

"C" Check - Every 6000 FH or

                                4500 FC or 20 months interval

"D" Check - Every 6 years

Hope I'd helped you in a way.

Unless you're talking about Gulfstream or HS125 or Citation, I think you're mothballed aircraft is so expensive. With fuel prices up planes would come in cheap this days or leasing companies would be almost giving away their planes for lease this days or risk of getting mothballed also.