Node A6 · Acronym decoder
LRU
Line-Replaceable Unit
What it actually means
A unit designed to be swapped quickly at the operational level — a black box a maintainer can replace on the flight line with common tools, sending the faulty unit back for shop repair. LRU partitioning is a maintainability design decision that determines what a two-hour fix versus a two-week fix looks like.
Where you'll meet it
Maintainability design, spares provisioning, and maintenance manuals.