First, the Electrics and Electronics Bay, page 8 — Page 657, Lesson 767

This is the index of the book — the map of the whole course. Let me walk you through the E-section, because it tells you exactly where every topic lives and how the book is organised. First, the Electrics and Electronics Bay, page 8. That's the E&E Bay — the compartment where the aircraft's electrical and electronic equipment is housed. It's a physical location on the aircraft, and page 8 introduces it early because it's the home of the systems you'll study all through the book. Then Electric Torque Motors, page 177. These are motors that produce a torque — a turning force — electrically. They appear in the context of instrument mechanisms, where a small electric motor drives a pointer or a display against a spring or a counter-torque. Electromagnetic Induction, page 216. This is the fundamental principle where a changing magnetic field induces a voltage in a conductor. It's the basis of generators, transformers, and many sensing instruments. Page 216 is where the book lays that foundation. Now the memory devices. Electronically Erasable Programmable Memory, EEPROM, page 309. And Erasable Programmable Read Only Memory, EPROM, also page 309. These are two types of non-volatile memory chips used in avionics. EPROM can be erased with ultraviolet light and reprogrammed; EEPROM can be erased and reprogrammed electrically, without removing it from the circuit. Both are used to store data that must survive power-off, like configuration settings or software. Electronic Chip, page 309 — that's the integrated circuit itself, the silicon device that contains the memory and processing logic. Now the display instruments. Electronic Attitude Director Indicator, EADI, pages 281 and 338. This is the electronic version of the attitude indicator — it shows pitch and roll, plus flight director commands. Electronic Horizontal Situation Indicator, EHSI, pages 281 and 340 — the electronic replacement for the compass and navigation display, showing heading, course, and navigation data. Both are part of the Electronic Flight Instrument System, EFIS, page 281. EFIS is the integrated system that replaces the traditional electromechanical instruments with cathode-ray or LCD displays driven by computers. Electronic VSI, page 488 — the electronic version of the Vertical Speed Indicator, showing rate of climb or descent. Emergency Mode, page 326. This is a degraded operating mode of a display system — when normal operation fails, the system reverts to a simplified, essential display so the crew retains critical information. EMF, page 217 — electromotive force, the voltage that drives current through a circuit. It's the electrical pressure produced by a source like a generator or battery. Engagement Criteria, page 359 — the conditions that must be met before a system, typically an autopilot or autothrottle, will engage. These are the specific parameters like airspeed, attitude, or system health that must be satisfied. Engine Power, page 25 — the power output of the engines, which is measured and displayed on the engine instruments. Enhanced Ground Proximity Warning System, page 467 — EGPWS, the system that warns the crew if the aircraft is in danger of hitting the ground, with enhanced terrain awareness. Environmental Errors, page 29 — errors in instrument readings caused by environmental factors like temperature, pressure, or humidity affecting the sensing element. Equivalent Airspeed, EAS, page 43 — the calibrated airspeed corrected for compressibility effects at high speed and altitude. It's the speed that corresponds to the same dynamic pressure as the true airspeed at sea level. Ergonomy, page 5 — the study of how instruments and controls are designed to fit human use — the layout, readability, and reachability of the cockpit. Error Correction, page 17 — the process of compensating for known errors in instrument readings. Error Signal Comparison, page 218 — in a servo system, the difference between the commanded value and the actual value, used to drive the system toward the correct output. Errors in the Looping Plane, page 186 — errors that occur in the plane of a loop, likely in the context of a gyroscopic instrument during manoeuvres. Errors of INS, page 238 — the errors of the Inertial Navigation System, which uses accelerometers and gyroscopes to track position. Errors of the VSI, page 74 — the errors of the Vertical Speed Indicator, like lag and static pressure errors. Errors Peculiar to the IVSI, page 75 — errors specific to the Instantaneous Vertical Speed Indicator, which uses accelerometer compensation to reduce lag. E-type, page 119 — likely a type of thermocouple, a temperature sensor made of specific metal alloys. EU-OPS Requirements, page — the European operating rules for commercial air transport, which set the standards for equipment and procedures. That's the whole E-section of the index. It shows you the breadth of the course — from basic electrical principles to complex display systems and navigation errors. Each page number is where you'll find the full treatment.