WGLTS 49.89 WGLTS 0.00 353 371 15° FS 625.30 FS 674.737 FS 652.264 100.72 135.845 151.14 177 185 200 155.315 218.17 230.131 2° NAC C L BL 86.179 FUS C L C FUS-WING STA 0 L 379 411 437 511.21 536 568.5 585 652.264 843.8 863 886 903 943 16.5 15.2 25.7 41.3 56.9 72.5 88.1 104.1 111 122 177.0 2° NAC C L BL 86.179 65.7 76.5 85.5 106.4 127.2 148 163 178 199 220 242 258 264 274 282 294.5 315.5 329.5 343.5 353 371 4° Zones Subzones ZONE 300—Empennage 351 321 322 323 325 324 326 311 312 ZONE 300—Empennage 331 332 333 334 335 341 342 343 344 345 ZONE 800—Doors 822 824 825 823 821 811 ZONE 100—Lower half of fuselage 111 112 123 122 121 134 135 133 132 131 143 142 141 144 146 145 Zone 500—Left wing  Zone 700—Landing gear and landing gear doors Zone 200—Upper half of fuselage  Zone 400—Engine nacelles  Zone 600—Right wing  Figure 1-91.  Wing stations are often referenced off the butt line, which bisects the center of the fuselage longitudinally. Horizontal  stabilizer stations referenced to the butt line and engine nacelle stations are also shown.  Figure 1-92.  Large aircraft are divided into zones and subzones for identifying the location of various components. 1-41