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Aircraft Accident Investigation
SF330
45
Aviation
Undergraduate 3
06/08/2011

Additional Aviation Flashcards

 


 

Cards

Term
FAA's 9 reasons for investigation to determine...
Definition

1. violation of regulation

2. adequacy of regulation

3. involvement of FAA personnel, facilities, functions

4. involvement of non FAA per aircraft

5. competency of FAA certificated airmen, air carriers, air agency, or other commercial operators

6. involvement of certification or air worthiness of an FAA certificated aircraft

7. involvement of medical certificate issues

8. involvement of airport safety issues

9. involvement of airport security

 

Term
4 Types of Investigations
Definition
  1. Complete/rigorous
    1. special interest
  2. Field Investigations
    1. done by regions
    2. special interest
  3. Incident Investigation
Term
International Investigations
Definition
Term
List of hazards at an accident site
Definition

-debris, chemical, pressure vessels, terrain (foliage), electrical, cargo (hazmat), blood borne pathogens (most regulated)

-"requires any one who in course of employment has the potential for exposure to human blood tissue, or other fluids is required to comply with these regulations"

-involved: cops, firefighters, investigators

-need decontamination & training

Term
Witness Types
Definition
  1. eye
  2. background
  3. expert
  4. response
Term
Witness Process
Definition

5 Phases

 

1)

2)

3)

4)

5)

Term
FDR Standards
Definition
Term
Aircraft Accident
Definition
means an occurrence associated with the operation of an aircraft which takes place between the time any person boards the aircraft with the intention of flight and all such persons have disembarked, and in which any person suffers death or serious injury or in which the aircraft receives substantial damages
Term
Incident
Definition
an occurrence other than an accident, associated with the operation of an aircraft, which affects or could affect the safety of operations
Term
Fatal injury
Definition
any injury which results in death within 30 days of accident
Term
Operator
Definition
any person who causes or authorizes the operation of an aircraft, such as the owner, lessee, or ballee of an aircraft
Term
Public Aircraft
Definition
an aircraft used only for the United States Government, or an aircraft owned and operated (except for commercial purpose) or exclusively leased for at least 90 continuous days by government other than by the United States Government, including a state, the District of Columbia, a territory or possession of the United States, or a political subdivision of that government
Term
Serious Injury
Definition
any injury which:
1) requires hospitalization for more than 48 hours, commencing within 7 days from the date of the injury was received;
2) results in a fracture of any bone (except simple fractures of fingers, toes, or nose);
3) causes severe hemorrhages, never, muscle, or tendon damage;
4) involves any internal organ;
or 5) involves second- or third-degree burns, or any burns affecting more than 5% of the body surface
Term
Substantial Damage
Definition
damage or failure which adversely affects the structural strength, performance, or flight characteristics of the aircraft, and which would normally require major repair or replacement of the affected competent
Term
5 W's to Aviation
Definition
  1. Who
  2. Where?
  3. When?
  4. What?
  5. Why?

Repeat twice: once for the accident and second for cause of accident

Term
Multi-linear Event Sequences
Definition

involves:

  • circumstances - political, company, etc that have a bearing on the situation
  • conditions - makes more likely for accident to happen
  • trigger
  • proximate event
  • knowns
Term
The Hierarchy of Human Error
Definition

Momentum to have accident increases from top to bottom

  • Design
  • Manufacturing
  • Management - always involved in accident
  • Maintenance
  • Operations - how we use aircraft, training, procedures, etc
  • System - ATC, FAA, weather
  • Pilot - last line of defense against all other human error; last one to interrupt sequence, if can
Term
Common factors in a propulsion accidents
Definition
impact angle
impact attitude
impact airspeed
surface impacted
-soft
-med
-hard
--composition
configuration of aircraft
Term
Deformations (5)
Definition
  1. fracture
  2. scratches
  3. gouges
  4. bends
  5. twists
Term
Fuel Exhaustion
Definition
no useable fuel in airplane due to pilot mismanagement
Term
Fuel starvation
Definition
Fuel isn't reaching engine(s) in the type/quantity to sustain combustions
Term
Air supply issues (2)
Definition
  1. vapor lock
  2. carb ice
Term
Vapor Lock
Definition
occurs warm environment
Term
Carb Ice
Definition
check plugs for rich mixture
air box
temperature down!
Term
Spark Plugs
Definition
  • soot deposits - rich mixture
    • fluffy that wipes off
  • ceramic - mixture is lean
    • plug is too hot to touch
  • grey droplet adhere
    • coming out of fuel
  • oil on plugs
    • depends on how much stored in engine
    • dead cylinders
    • burn smell? rings on exhaust wearing out
      • reduce RPM
Term
Stress/Strain curve
Definition

x-axis: strain (in/in)

y-axis: stress (lbs/in^2)

 

A:  Normal Operating Range (NOR) - safety margin allows for error without breaking

B: Redline

C: Limit Load - permanent deformation of plastic range

D: Ultimate Load - exceeds limit load and cannot ever return to a neutral position; permanent damage

Term
Stress/Resistance Curve
Definition

x-axis: exposure (time, cycles, operational hours)

y-axis: force (lb/in^2)

Term
2 Forms of Failure
Definition
  1. instantaneous
  2. progressive
Term
Types of Failure (3)
Definition
  1. functional
  2. potential
  3. hidden-fuction
Term
Fatigue Forms (2)
Definition
  1. high stress/low cycle
    • identifiable
    • propagates fast
    • not common
  2. low stress/high cycle
    • by itself - no load excursion
    • fatigue zone - load cycles unknown
    • have to inspect to find it
    • most problematic

 

Term
4 Elements of Corrosion
Definition
  1. anode
  2. cathode
  3. conductive path
  4. conductive flow
Term
2 Types of Corrosion
Definition
  1. exfoliative
  2. interganular
Term
Aluminum
Definition
  • 2xxx = copper
  • 3xxx = manganese
  • 4xxx = silicon
  • 5xxx = magnesium
  • 6xxx = copper/magnesium
  • 7xxx = zinc
Term
Production Process (4)
Definition
  1. casting
  2. forging
  3. extrusion
  4. rolling
Term
Wear (2)
Definition
  1. normal
  2. abnormal
Term
Maintenance (3)
Definition
  • on-condition
  • condition monitoring
  • hard time
Term
Material Characteristics (6)
Definition
  1. strength
  2. hardness
  3. elasticity
  4. durability
  5. weight/mass
  6. cost
Term
Directions of Loads (5)
Definition
  1. Bending
  2. Compression
  3. Shear
  4. Tension
  5. Torsion
Term
Composites
Definition
  • more inelastic
  • easier to make
  • cheaper
  • lighter
  • unpredictable
  • burn hazard
Term
4 Kinds of Consequences/Severities
Definition
  1. catastrophic
  2. critical
  3. minor
  4. non-significant
Term
Types of Reports (4)
Definition
Term
3 Levels of Recommendations
Definition
  1. Engineering Change
  2. Procedural Change
  3. Personnel
Term
Reasons for Instantaneous Failure
Definition

overload

under design

combination

certification loads

material or manufacturing defect

Term
4 Things needed for Progressive Failure
Definition

1) stress riser

2) cyclic loading

3) local tension stress

4) local plastic deformation

Term
Refining Process
Definition
  1. cold
  2. heat
  3. chemical
  4. retempuring
    • drilling
    • sanding
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