Figure 4.8. Split Power Reduction Gearing (T53L701).
N1 drive is provided from a pinion gear (9) mounted on the
forward end of the compressor rotor shaft, driving two bevel gears
(10 and 19) located within the accessory gear carrier. The bevel
gear located at the six o'clock position within the carrier, being
the accessory gearbox drive gear (10), is splined internally to
accept the accessory gearbox shaft (18). This drive shaft connects
the gear carrier to the accessory gearbox through the 90 pinion gear
(16) which in turn is splined directly to the startergenerator drive
gear (15). The startergenerator drive gear provides drive to all
subordinate gears located within the accessory gearbox housing.
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