Depressurisation Flashcards

1
Q

Estimated time of useful consciousness
43000 feet

A

10 seconds

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2
Q

Estimated time of useful consciousness
40,000 feet

A

15 seconds

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3
Q

Estimated time of useful consciousness
35,000 feet

A

45 seconds

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4
Q

Estimated time of useful consciousness
30,000 feet

A

1 minute

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5
Q

Estimated time of useful consciousness
25,000 feet

A

3 minutes

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6
Q

Estimated time of useful consciousness 20,000 feet

A

10 minutes

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7
Q

What people are more likely to suffer from hypoxia

A

-heart conditions
-respiratory illness
-cold + fatigue
-blood disorders
-use of alcohol drugs, heavy smokers

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8
Q

Early signs of hypoxia

A

-similar to being intoxicated with alcohol
-reduced night vision

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9
Q

Mild signs of hypoxia

A

Breathlessness, sleepiness, difficulty in concentration, indifference, unwarranted self confidence, increased pulse rate

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10
Q

Moderate/severe hypoxia

A

Blue lips + finger tips (cyanosis)
Euphoric
Unconscious
Impaired vision and memory
Headache
Breathlessness
Erratic
Slowed thinking
Acting drunk
Etc

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11
Q

Visible indications of hypoxia

A

Blue lips and fingertips
Laboured breathing

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12
Q

Gas expansion, sites for potential trapped gases include:

A

Ears
Sinuses
Abdomen/intestines
Teeth

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13
Q

How can you relieve gas expansion?

A

Swallow
Yawn
Suck a sweet
Cry
Blow nose
Hold and exhale gently through nose

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14
Q

Symptoms of decompression sickness

A

Joint pains
Chest pains
Blotchy/marbled skin rash
Visual and mental impairment
Dizziness and confusion
Collapse/unconsciousness

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15
Q

Oven fire what does ski stand for

A

Switch of electrical power supply
Keep door closed
Implement basic fire drill

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16
Q

Nearest oxygen mask

A

Don

17
Q

Nearest seat

A

Occupy

18
Q

Seatbelt

A

Fasten

19
Q

Com station

A

Proceed

20
Q

Follow up duties

A

Carry out

21
Q

Crew oxygen

A

Use

22
Q

What is explosive depressurisation

A

May be caused by a collapse of a door or damaged aircraft structure

23
Q

What is sudden depressurisation

A

Caused by a failure of pressurisation system which leads to obvious loss of cabin pressure

24
Q

What is gradual depressurisation

A

A slow pressurisation leak or air conditioning failure

25
Q

What may occur during depressurisation

A

-initial effects of hypoxia
-sudden boiling of liquids
-pain in ears and sinuses
-mist forming in cabin(not smoke)
-air becoming cold and thin
-need to breath rapidly
-disturbance of dust and loose papers
-discomfort or pain due to pressure of gasses trapped in the body

26
Q

Should the aircraft altitude reach an unsafe level the following occurs

A

Psu masks drop
Cabin lighting illuminates
No smoking and fasten seatbelts
Automatic pa instructing passengers how to use oxygen
Flight deck manual oxygen deployment switch is activated as a checklist item

27
Q

What is average adult respiratory rate at cabin altitudes of 5000-8000 feet

A

16-20 times per min