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heavy maintenance work

Defined in 1 place of the United States Code.

Heavy maintenance work.—The term "heavy maintenance work" means a C-check, a D-check, or equivalent maintenance operation with respect to the airframe of a transport-category aircraft.

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Heavy maintenance work.—The term "heavy maintenance work" means a C-check, a D-check, or equivalent maintenance operation with respect to the airframe of a transport-category aircraft (including on-wing aircraft engines).

Source

The term “heavy maintenance work” means a C-check, a D-check, or equivalent maintenance operation with respect to the airframe of a transport-category aircraft (including on-wing aircraft engines).

Source