STATION REFERENCE LINES
To facilitate location of various components which require maintenance and servicing, a method utilizing
fuselage station (F. S.), wing station or buttock line (BL), and water line (WL) is frequently used in this
manual. (Refer to figure 6-2.) Fuselage stations, buttock lines, and water lines are reference points measured in
inches in a vertical or horizontal direction from a given reference line. Fuselage station 0 is 78.4 inches
forward of wing leading edge or 44.5 inches forward of lower edge of firewall. Station 0 BL of wing and
stabilator is centerline of airplane. Station 0 WL of fuselage, vertical stabilizer, and rudder is 20.5 inches below
the cabin floor as measured at rear wing spar with airplane level. The reference datum is located 78.4 inches
forward of wing leading edge at the intersection of the straight and tapered section.
Figure 6-2. Station Reference Lines
6 - 20 - 00
Page - 6 - 04
Reissued: August 1, 1986
1B18
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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