Aircraft A Checks C Checks

Of course! Here’s a clear list of A-checks and C-checks typically done for an aircraft. I’ll make it structured and easy to follow:





A-Check (every ~400–600 flight hours or 200–300 cycles)



Light maintenance, usually done overnight or during short downtime.



General A-Check Items:



  • Visual inspection of fuselage, wings, landing gear.
  • Lubrication of key parts (hinges, actuators, etc.).
  • Operational checks of emergency equipment (oxygen bottles, fire extinguishers).
  • Cabin interior check (seats, belts, lavatory systems).
  • Inspection of fluid levels (oil, hydraulic fluid, potable water).
  • Tire and brake inspection.
  • Avionics system functional check.
  • Lighting systems check (internal and external).
  • Minor software updates (if applicable).
  • Fuel leak checks.
  • Drain water separators and sumps.
  • Replacement of filters (air conditioning, hydraulics).
  • Battery condition inspection and servicing.






C-Check (every ~20–24 months or specified flight hours/cycles)



Much deeper inspection, aircraft out of service for 1–2 weeks typically.



General C-Check Items:



  • Detailed structural inspection (using borescopes, non-destructive testing like ultrasonic or X-ray methods).
  • Comprehensive system checks (hydraulics, pneumatics, avionics, flight control systems).
  • Full landing gear inspection and servicing (may involve partial disassembly).
  • Interior refurbishment (carpets, panels, seats removal for inspection).
  • Corrosion inspection and treatment.
  • Electrical wiring checks and potential rewiring.
  • Pressure bulkhead and door seal inspections.
  • Engine and APU (Auxiliary Power Unit) inspections (sometimes off-wing checks).
  • Removal and inspection of flight control surfaces (rudder, elevators, ailerons).
  • Update or modification of airworthiness directives (ADs) or service bulletins (SBs).
  • Detailed fuel tank inspection (including opening of tank access panels).
  • Full operational tests of backup and redundant systems.
  • Replacement of life-limited parts nearing expiration.





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