CAT-A Module 12  Helicopter Systems and Structures: please see note regarding availability

CAT-A Module 12
Helicopter Systems and Structures

Copyright Date:
8.5" x 11.0"
eBook (PDF)ebook product type image
coming soon!

This book (and module 11B) are unlike others in the series. They are provided to ATB by TEC Aviation Academy of Copenhagen, Denmark. While the format of the book differs (pages in a horizontal format) it is fully compliant to EASA Part 66 and the best and the most up to date book we know for basic helicopter maintenance.

NOTE: We have noted some last minute issues with this book are now working with the authors to resolve them. For now, we are unsure of the time needed to accomplish this. If you would like a personal notification when availability resumes, please email and say so.

Click the picture above to see sample pages.

To EASA Part 66 students and instructors:
This book is in full compliance with your instructional and learning needs in order to pass the required exams for the CAT-A3 and -A4 Helicopter Maintenance licenses.

To US and other non-EASA students and instructors:
The content in this book is both current and outstanding, far surpassing the now discontinued Jeppesen Helicopter Maintenance book. If you or your school require extended training in helicopter structures and systems, this is it.

eBook File Description:

File Type:
secure pdf ebook
yes, 20 pages only
Offline Access:
System Reqs:
Windows, Macintosh, iPad, and more

Helpful eBook Links:


Rotary Wing Aerodynamics:
gyroscopic precession
torque reaction and directional control
dissymmetry of lift, blade up stall
translating tendency
coriolis effect
vortex ring state, power settling, overpitching
ground effect

Flight Control Systems:
cyclic control
collective control
yaw control, anti-torque, tail rotor, bleed air
main rotor head
blade dampers
rotor blade construction and attachment
trim control
system operation, manual, hydraulic, electrical, fly-by-wire
artificial feel
balance and rigging

Blade Tracking and Vibration Analysis:
rotor alignment
rotor tracking
static and dynamic balance
vibratin types and reduction
ground resonance

gear boxes; main and tail rotors clutches; free wheel and rotor brakes tail rotor drive shafts, flexible couplings, bearings, vibration dampers, bearing hangers

Airframe Structures:
airworthiness requirements for structural strength
primary, secondary, tertiary structures
fail safe, safe life, and damage tolerance
zonal and station identification
stresses and strains
drains and ventilation
system installation provisions
lightning strike protection
construction methods
pylon, stabilizer, and undercarriage attachments
seat installation
doors; construction, mechanisms, operation
windows and windscreens
fuel storage
engine mounts
structure assembly techniques
surface protection
surface cleaning
airframe symmetry

Air Conditioning:
air supply
air conditioning systems
distribution systems
flow and temperature control
protection and warning devices

Instrument and Avionics Systems:
pitot static instruments
gyroscopic instruments
compass instruments
vibration indication (HUMS)
glass cockpit
other system indications

avionics fundamentals and operation
auto flight
communication systems
navigation systems

Electrical Power:
battery installation and operation
DC power generation
AC power generation
emergency power generation
voltage regulation
circuit protection
power distribution
inverters, transformers, rectifiers
external power

Equipment and Furnishings:
seats, harnesses, and belts
lifting systems
emergency floatation systems
cabin layout
cargo retention
equipment layout
cabin furnishing installation

Fire Protection:
fire and smoke detection and warning
fire extinguishing systems
system tests

Fuel Systems:
system layout
fuel tanks
supply systems
dumping, venting, and draining
cross feed and transfer
indications and warnings
refueling and defueling

Hydraulic Power:
system layout
hydraulic fluids
reservoirs and accumulators
pressure generation; electric, mechanical, pneumatic
emergency pressure generation
pressure control
power distribution
indication and warning
interface with other systems

Ice and Rain Protection:
ice formation, classification, detection
anti-icing and de-icing systems
rain repellent and removal
probe and drain heating
wiper systems

Landing Gear:
construction, shock absorbing
extension and retraction systems
indication and warnings
wheels, tires, brakes
air-ground sensing
skids, floats

external, navigation, landing, taxiing
internal, cabin, cockpit, cargo

system layout
sources; engine APU, compressors, reservoirs, ground supply
pressure control
indications and warning
interfaces with other systems

Integrated Modular Avionics:
typically integrated functions
core system
network components

On Board Maintenance Systems:
central maintenance computers
data loading systems
electronic library system
structure monitoring

Information Systems:
storing, updating, and retrieving data
general information systems
flight deck information
maintenance information systems
cabin information system
misc information system


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