STAB STA

WBL 750.00
PLAN VIEW OF WING
Reference Planes and Lines
Figure 1 (Sheet 2)

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757
MAINTENANCE MANUAL

 FS

ISS

LES
MAC
OSS
RS W STA or WS
WBL
WRP The principal spanwise transverse member of the wing structure, It is perpendicular to the wing reference plane.
Inboard Slat Stations. These are planes perpendicular to inboard leading edge slats. They are measured from the intersection of the slat rotation axis and a plane perpendicular to the wing reference plane.
Leading Edge Station. These are planes perpendicular to the wing reference plane and the leading edge. They are measured from the intersection of the leading edge extension and the wing buttock line 0.00.
Mean Aerodynamic Chord. This is the chord of a section of an imaginary airfoil which would have vectors throughout the flight range identical to those of the actual wing.
Outboard Slat Stations. These are planes perpendicular to the outboard leading edge slats, They are measured from the intersection of the slat rotation axis and a plane perpendicular to the wing reference plane.
See definition for FS.
Wing Station. These are planes perpendicular to the wing reference plane and the plane of the outboard rear spar. They are measured from the intersection of the extended leading edge and wing buttock line 0.00.
Wing Buttock Line. This is a plane perpendicular to the wing reference plane and parallel to the trace of the fuselage centerline. It is measured from intersection of wing reference plane and body buttock line
 0.00.
Wing Reference Plane. This is the datum plane of the wing. It is inclined up 5 degrees with respect to the BWL plane and passes through the intersection of the BBL 0.00 and BWL 178.187909.
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757
MAINTENANCE MANUAL

 WTS  Wing Tip Station. This is a plane perpendicular to the wing reference plane and wing buttock line 0.00. It is measured from the intersection of the leading edge and wing buttock line 0.00.
 (3) Vertical Stabilizer
 ASS  Auxiliary Spar Station. This is a plane perpendicular to the vertical stabilizer auxiliary spar. It is measured from the Auxiliary Spar Station 0.00, intersection of the auxiliary spar centerline extension and body waterline 228.99 (757 ROOT CHORD).
 FIN STA  Fin Station. This is a plane perpendicular to the centerline of the vertical stabilizer rear spar. It is measured from Fin Station 0.00, intersection of rear spar centerline extension and body waterline 228.99 (757 ROOT CHORD).
 FSS  Front Spar Station. This is a plane perpendicular to the vertical stabilizer front spar. It is measured from the fin front spar station 0.00, intersection waterline 228.99 (757 ROOT CHORD).
 LES  Leading Edge Station. These are planes perpendicular to the vertical stabilizer leading edge. They are measured from the leading Edge Station 0.00, intersection of the leading edge line extension and body waterline
 228.99 (757 ROOT CHORD).
 LFFS  Lower Front Spar Station. These are planes perpendicular to the vertical stabilizer lower front spar. They are measured from the Lower Front Spar Station 0.00, intersection of the lower front spar centerline extension and body waterline 228.99 (757 ROOT CHORD).
 RUD STA  Rudder Station. These are planes perpendicular to the rudder hinge centerline. They are measured from Rudder Station 0.00, intersection of rudder hinge centerline and body waterline
 228.99 (757 ROOT CHORD).
 (4) Horizontal Stabilizer
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