Line maintenance refers to routine, limited maintenance tasks performed on an aircraft before, between, or after flights to keep it serviceable for daily operations and to clear minor defects without returning the aircraft to a hangar. In maintenance manuals, work orders, MRO documentation, and dispatch-related forms, it is distinguished from hangar or heavy maintenance and typically includes inspections, fluid and tire servicing, and component replacement within approved limits.
This term appears in maintenance programs, turnaround inspection checklists, dispatch documentation, and MRO service agreements. Translators encounter it when localizing job cards, logbook entries, and reliability reports, where line maintenance must not be rendered as line-fabrication or electrical line work. It also occurs in software for ramp operations and scheduling.
The most serious error is translating “line maintenance” as “线路维护,” which suggests electrical wiring or circuit maintenance rather than ramp maintenance between flights. This can misdirect maintenance staff and misclassify tasks, especially in job cards and logbook descriptions where task type affects dispatch decisions. Less severe but also common is treating it as heavy maintenance.
EASA and CE certification impose language requirements on maintenance and safety documentation. These terms carry airworthiness and liability implications, so they are rendered against the governing standard rather than translated freely.
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