Aircraft Maint.

[crewboi83]

I'm just a simple hostie, but I was wondering if someone could explain to me what the A, B, C, D Checks of the aircraft are?
When are the individual checks carried out? what do the consist of?
Any info is appriciated

[alexban]

Something like checks on your car. The simplest one (A ) is oil ,and tyre pressure check.The most complex one (D) will consist of engine removal ,and car stripped down to skin.
Checks are done at a specific number of kilometers. For a car,of course..:E

[forget]

Aircraft maintenance checks are periodic checks that have to be done on all aircraft after a certain amount of time or usage. Airlines casually refer to these checks as one of the following: A check, B check, C check, or D check. A and B checks are lighter checks, while C and D are considered heavier checks.

A Check — This is performed approximately every month. This check is usually done overnight at an airport gate. The actual occurrence of this check varies by aircraft type, the cycle count (takeoff and landing is considered an aircraft "cycle"), or the number of hours flown since the last check. The occurrence can be delayed by the airline if certain predetermined conditions are met.

B Check — This is performed approximately every 3 months. This check is also usually done overnight at an airport gate. A similar occurrence schedule applies to the B check as to the A check.

C Check — This is performed approximately every 12-18 months. This maintenance check puts the aircraft out of service and requires plenty of space - usually at a hangar at a maintenance base. The schedule of occurrence has many factors and components as has been described, and thus varies by aircraft category and type.

D Check — This is the heaviest check for the airplane. This check occurs approximately every 4-5 years. This is the check that, more or less, takes the entire airplane apart for inspection. This requires even more space and time than all other checks, and must be performed at a maintenanc

http://en.wikipedia.org/wiki/Aircraft_maintenance_checks

[crewboi83]

Thanks for that!

[Piper19]

Maybe just add that the name of the check and time interval is different from aircraft to aircraft. Some have checks called "service checks", "weekly checks", e.g.
In theory, every preflight check done by a crewmember is also part of the Daily-weekly-Service-A-B-C-D check system.