In the aircraft maintenance procedure, what is the diffrence between A check, B check and C check?

aircraft maintenance checks periodic checks have done on aircraft after amount of time or usage. airlines casually refer these checks 1 of following: check, b check, c check, or d check. , b checks lighter checks, while c , d considered heavier check

check
performed approximately every month. check done overnight @ airport gate. actual occurrence of check varies aircraft type, cycle count (takeoff , landing considered aircraft "cycle"), or number of hours flown since last check. occurrence can delayed airline if predetermined conditions met.500 flight hours (fh).

b check
performed approximately every 3 months. check done overnight @ airport gate. similar occurrence schedule applies b check check.

c check
performed approximately every 12-18 months or 2500 flight hours (fh). maintenance check puts aircraft out of service , requires plenty of space - @ hangar @ maintenance base. schedule of occurrence has many factors , components has been described, , varies aircraft category , type.

d check
heaviest check airplane. check occurs approximately every 4-5 years. check that, more or less, takes entire airplane apart inspection. requires more space , time other checks, , must performed @ maintenance base. often, older aircraft being phased out of particular airlines' fleet stored or scrapped upon reaching next check.

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