11.2 / 11.3.1 Flashcards
Subpart C
Structure
Subpart D
Design
Safe life
Requires structural elements be replaced after a fixed number of cycles
Damage tolerance
Ensures damage found and repaired before strength is below a min level
Lighting prevention
Require electrical contact between all metalic and composite parts
System installation provision
Consideration given to construction of fuselage
Eg consider wherr cables are routed through
Drainage
Fuselage drain valves used
They are opened when plane is unpressurised
Primary construction
Consists of those parts of an aircraft that bear loads
Secondary construction
Gives the aerodynamic shape to aircraft
Primary structure
Structure that if fails plane will suffer catastrophic failure
Secondary
If fail wont cause catostrophic failure
Buttock lines
X co ordinate
Body lines
Y co ordinate
Water lines
Z co ordinate
Zonal identification system
100: lower fuselage
200: upper fuselage
300: stabilisers
400: nacelles
500: left wing
600: right wing
700: landing gear
800: doors
Stressed skin construction
Monocoque
Semi monocoque
Monocoque
- Single shell
* all strength and structure carrier in the outside skin
Semi monocoque
Stringers installer to reinforce skin , semi monocoque not all of load on outside skin
ATA 52
Doors
ATA 53
Fuselage
Fuselage construction
Semi monoxoque
2 doors
Plug type : close from inside , bigger than cut out
Non plug type: close from outside, hinges carry the load
Window types
Cabin
Flight deck
Cockpit windows
- Windshield and side windows
* windows heated for ice , fog and flexibility
Cabin windows
3 windows: outside , middle and protective glass
What are production break points
Where fuselage is broken into sections
