Chapter 1 - Aircraft Structures Flashcards
What is the longitudinal reference line called, and what is its prefix?
Stations
Prefix X
Where is the longitudinal reference line datum position?
Forward of the nose
What is the lateral reference line called, and what is its prefix?
Buttock lines
Prefix Y
What is the vertical reference line called, and what is its prefix?
Water Lines
Prefix Z
Where is the vertical reference line datum position?
Below the airframe, in line with the ramp
Name the Flight Servicing zonal areas
100 - Cockpit 200 - Centre and lower fuselage (LH&RH) 300 - Rear fuselage 400 - Tail unit & blades 500 - Main Transmission
Internals - cabin and cockpit
What are sub zones and sub sub zones used for?
Identifying access panels and cowlings
What do each character represent in the 5 character identification numbers?
Zone Sub Zone Sub sub zone Primary identifier Locator
List the 5 locator letters and their meanings
T - Top B - Bottom L - Left of, and on, the a/c centre line R - Right of a/c centre line Z - Internal
Name the 3 structure classifications
Primary
Secondary
Tertiary
Describe Primary structure
Critical for safe operation
Describe Secondary Structure
Structure that, when damaged, could become critical
Describe Tertiary Structure
Unstressed or lightly stressed parts
Give an example of tertiary structures
- Batter cover panel
- Cabin windows
Describe a composite
Sandwich structure that combines two or more materials to form a new, stiffer one
List the composite materials used in the airframe
Kevlar/Nomex
Carbon Nomex 175
Carbon Nomex 125
Al Lithium
What areas use kevlar?
High impact areas
What areas use carbon Nomex?
Areas that require strength and stiffness
High heat areas
What areas use Al Lithium?
Cabin
Stabilisers
What is delamination?
Separation of layers in a composite structure
What is debonding?
failure of the bond between the skin and core
What does BVID stand for?
Barely Visible Impact Damage
Name 8 examples of composite damage
Delamination Debonding Environmental Factors Moisture Ingress Cracks Surface Scoring Bearing Damage BVID
Name the 4 airframe modules
Cockpit/ Forward fuselage
Cabin/ Centre fuselage
Rear fuselage
Tail unit
What is the purpose of the airframe?
Act as a platform to house operational systems and personnel
When can the forward sliding door remain open?
< 50 kts
What positions can the cargo door be?
Closed
Partially open
Fully open
What windows are not jettison?
Canopy Windscreen Lower Windows Direct Vision windows Fixed Bubble
How many escape ladders are they, and what are they for?
6
For aircrew to get to a window if the aircraft is on its side
How many cabin escape windows are there?
6
What is the wire strike protection system used for?
Protects personnel and surrounding equipment from being striked by wires & cables
Name the 3 wire strike locations below the aircraft
Lower cutter & struts
Windshield wiper post cutters
IFF Deflectors
Name the 3 wire strike locations on the upper part of the aircraft
Upper cutters & struts
Cowling deflector strap
Multi-band antenna cutter
