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Understand how display-processing computers create graphics for four display units and how control panels select what the crew and maintenance staff see.
Build a durable mental model of Systems A and B, the standby system, pressure sources, reservoirs and the difference between hydraulic power removal and a true zero-energy condition.
Understand the standby reservoir, electric pump, pressure module and backup-function role without confusing the standby circuit with normal Systems A or B.
Learn what the PTU transfers, why the A and B fluids do not need to mix, and how leading-edge-device, air/ground and pressure-switch logic enter the functional picture.
Understand how engine-driven generation becomes controlled aircraft AC power and why source quality matters before a bus is energized.
Understand the EDP/EMDP pairings, reservoir role, pressure-source differences and why pump availability must be separated from actual system capability.
Understand why the NGS exists and trace source air through conditioning, separation and NEA distribution to the center tank.
Build the complete ATA 21 mental model: pneumatic supply, packs, mixing/distribution, recirculation, zone control and pressurization as related but distinct functions.
An original diagram linking storage, boost sources, feed/crossfeed paths, APU/engine consumers and the separate ATA 47 inert-gas protection layer.
Use pressure, LOW PRESSURE and system behavior as separate evidence streams instead of treating one cockpit indication as a complete hydraulic diagnosis.
Connect internal leakage, contamination control, residual pressure, fluid temperature and movement hazards into one maintenance-oriented reasoning model.
Trace fuel from main/center tanks through boost-pump and manifold paths toward engines and APU without copying the manufacturer schematic.
An original diagram of the NGS feed-conditioning chain, ASM separation and NEADS route to the center tank.
A single original TechOpsBase diagram showing how ATA 36 supply air becomes ATA 21 conditioned air, cabin distribution, temperature control and pressurization.
A four-diagram original TechOpsBase visual explainer for Systems A/B, pump pairing, standby hydraulics and the PTU relationship.
An original source-to-bus diagram linking IDGs, APU/external power, AC buses, TRUs, DC buses, battery and standby conversion.
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