What are fuselage stations
Measures lengthways from a reference point along the fuselage
What are wing stations
Measurements along the span of the wing with wing station “0” the centreline of the fuselage
What are butt lines
Used to measure left or right from imaginary centreline of fuselage
What are water lines
Used to measure height from an imaginary horizontal line
what are xyz axis system
Identifies, lateral, longitudinal, vertical axis. Identified by the manufacturer
How are engines numbered
from left to right from the pilots perspective
outboard first
what does LE, MLG, US mean
Leading edge
Main landing gear
Un serviceable