Scheduled maintenance
Scheduled maintenance means any adjustment, repair, removal, disassembly, cleaning, or replacement of vehicle components or systems which is performed on a periodic basis to prevent part failure or vehicle (if the engine were installed in a vehicle) malfunction.
Source
40 CFR § 86.082-2
Scoping language
The definitions of this section apply to this subpart and also to subparts B, D, I, and R of this part.