NCATT AET study guide
NCATT AET · Work through your exam, one topic at a time.
The NCATT Aircraft Electronics Technician (AET) certification is a personnel credential for technicians who install, maintain, inspect, and troubleshoot avionics and aircraft electrical systems. ASTM International lists NCATT within its certification programs, and the AET is the foundational level of that family - the entry point on which further NCATT endorsements are built. The NCATT AET study guide has 6 sections and about 1,878 words.
01Aircraft Fundamentals
An aircraft in steady flight balances four forces: lift, weight, thrust and drag. Lift rises with angle of attack, airspeed squared, air density and wing area, up to the stall.
349 words, about 2 min02Basic Electricity and Electronics
Voltage is electrical pressure, current is charge flow, and resistance opposes current. Ohm's law gives V = I x R; power is P = V x I = I squared x R = V squared / R.
350 words, about 2 min03Digital Techniques and Aircraft Computers
Digital systems represent values in binary; a byte is 8 bits, and a word is the processor's natural width. Convert binary to hex in groups of four bits, and hex to decimal by place value.
288 words, about 1 min04Wiring, Connectors, and Terminations
A wire is a conductor, insulation and often a shield. American Wire Gauge numbers run inversely: a larger AWG number means a smaller conductor with less current capacity.
304 words, about 2 min05Test Equipment, Measurement, and Troubleshooting
The multimeter measures voltage, current, resistance, continuity and diode drop. A voltmeter goes in parallel and should have high impedance; an ammeter goes in series and has low resistance.
271 words, about 1 min06Avionics and Aircraft Systems Installation
Avionics installation begins with approved data: wiring diagrams, equipment location, power budget and weight-and-balance impact. Each LRU needs a proper rack or mount, correct connectors, keying and torque, plus enough cooling and vibration isolation.
316 words, about 2 min