This document provides dimensions and reference lines for the AW109E helicopter. It defines station lines, water lines, and buttock lines which are used to identify locations on the helicopter. Station lines run vertically along the longitudinal axis, water lines run horizontally along the vertical axis, and buttock lines run vertically along the lateral axis. Main dimensions of the helicopter include its overall length, height, and width.

1. AW109E
DIMENSIONS AND
AREAS

2. AW109E DIMENSIONS AND AREAS
REFERENCE
• A 109 E TYPE RATING GROUND COURSE (TMA019E-TRGC)

3. AW109E DIMENSIONS AND AREAS
LESSON OBJECTIVE
The objective for this lesson is:
 To identify the principal dimensions, and the reference
lines of the A109E helicopter.

4. AW109E DIMENSIONS AND AREAS
Airframe Reference Lines
 Refer to figure, for an illustration of the airframe reference
lines
Station Lines (sta)
 Are vertical planes perpendicular to and measured along
the longitudinal axis of the helicopter.
 Measured in millimeters from a reference point (STA 0).
o Ex: STA 0 is 3362 mm forward of the main rotor head center.

5. AW109E DIMENSIONS AND AREAS
Water Lines (wl)
 Are horizontal planes perpendicular to and measured
along the vertical axis of the helicopter.
 Measured in millimeters from a reference point (WL 0)
o Ex: WL 0 is 2494 mm below the main rotor head center.
Buttock Lines (bl)
 Are vertical planes perpendicular to and measured to the
left and right along the lateral axis of the helicopter.
 BL 0 is the plane of the vertical centerline of the helicopter.

6. AW109E DIMENSIONS AND AREAS
MAIN DIMENSIONS

7. AW109E DIMENSIONS AND AREAS
MAIN DIMENSIONS

8. AW109E DIMENSIONS AND AREAS
REFERENCE LINES

9. AW109 DIMENSIONS AND AREAS