Aircraft maintenance is more important today than at any other time in history. This is not only because the planes and helicopters currently used are highly advanced from a technological standpoint, but also because they are flown longer. With proper maintenance, passengers arrive at their final destination on time and safely. Of course, in order for technicians to perform stellar work, they must be highly trained with using approved aircraft maintenance equipment.

Ultimately, well-maintained planes and helicopters perform optimally, are more reliable, and provide passengers with a safer mode of transportation. Mechanical technicians check and work on virtually every inch of an aircraft. To reach some of the higher areas, they often use aircraft ladders, height adjustable aircraft maintenance platforms or aircraft wrap around maintenance stands. With these stands, technicians and their tools can move around freely without the risk of falling.

Although maintenance requirements vary for different types of aircraft, experience shows that most aircraft need some type of preventive maintenance every 25 hours or less of flying time, and minor maintenance at least every 100 hours. This is influenced by the kind of operation, climatic conditions, storage facilities, age, and construction of the aircraft. Maintenance manuals are available from aircraft manufacturers or commercial vendors with revisions for maintaining your aircraft.


Aircraft maintenance is an area of significant importance because maintaining an aircraft in a good condition increases aviation safety. Modern aviation maintenance is divided into four checks: A; B; C; and D checks. These checks are carried out at predetermined times based on the number of flight cycles (landings and take-offs) or flight time. These checks are performed under an on-going maintenance program.

Aircraft Maintenance Checks

  • A Check
    A Check is a light check carried out usually overnight at an airport gate. This check is carried out every month or every 500 flight hours, however, depending on the aircraft type the timing can change.
  • B Check
    B Check is also a light check carried overnight at an airport gate. This check is normally performed every 3 months.
  • C Check
    C Check is a heavy maintenance check usually carried out every year or every 1.5 years. Since this check requires disassembly of critical parts, this check is performed in a hangar.
  • D Check
    D Check is sometimes called overhaul check or heavy maintenance check. This check is performed in every 4-5 years: inspection of entire aircraft is carried out. 

Using the appropriate aircraft maintenance equipment, whether this entails light, mobile aircraft ladders or mobile adjustable aircraft maintenance stands or helicopter maintenance stands, testing is by far the most important of all operational activities performed. Technicians check literally every aspect of a plane, including the tail, wings, fuselage, pumps, communication equipment, valves, and more. Engine maintenance stands and wheel and brake changers are also common types of equipment used. Tow bars are used to move the planes from station to station for checks. During a careful inspection, anything that is damaged, worn, or outdated is immediately replaced. Considering the importance of passenger safety, proper aircraft maintenance is vital!