Exam 4 - MOD 11 Flashcards
When does turbulence occurs?
When the aircraft encounters “rough air” resulting in unusual aircraft movement.
What is clear air turbulence?
Caused when bodies of air moving in different directions collide.
What type of turbulence is impossible to detect, can’t be predicted and hits without warning?
Clear air turbulence.
Where does wake turbulence form?
Forms behind an aircraft.
What is frontal weather?
When 2 air masses meet along a front. Cooler dense air pushes warm air upwards resulting in cloud formation, precipitation and expected turbulence.
What are the 3 types of turbulence?
Light
Moderate
Severe
What forms of communication are used for turbulence?
Pre flight briefing
PA call
Seat belt sign
Announcement
What is the prioritization of duties during turbulence?
Discontinue service Stow carts Store hot liquids Secure galley equipment Close and latch all galley apartments Verify passenger seatbelt compliance Secure themselves to jumpseat
What are the 2 types of incapacitation of crew members?
Obvious - can be seen (heart failure, eye injury, etc.)
Subtle - not obvious (mental lapse, brain tumor, etc.)
What are the 4 steps for the incapacitated crew member procedure?
- Inform the captain
- Administer fist aid as required
- Secure incapacitated FA in passenger seat
- The remaining FAs will assume incapacitated FAs duties
*If an emergency is declared an ABP is placed in the jumpseat and briefed on emergency exit operation and procedures
What are the 6 steps for the incapacitated Flight Crew procedure?
- HANDS - Hands off controls
- SEAT - Push the seat back towards the aft
- FEET - Remove feet from the controls
- SIT - Sit them upright (if slumped over)
- STRAP - Secure their harness and strap their arms into it
- AIR - Administer first aid oxygen
In what situations may first aid oxygen have to be administered?
Decompression and medical emergency
What altitude is the cabin pressurized to?
8000 feet above sea level
What are the major causes of hypoxia in a medical emergency?
Respiratory Insufficiency (airway obstruction, respiratory arrest, etc.) Circulatory Insufficiency (heart attack, cardiac arrest, etc.) Hemoglobin Insufficiency (major blood loss)
What is hypoxia?
A decrease in supply of oxygen to the body tissues.
What is the procedure for First Aid Oxygen. (12 steps)
- Contact MedLink
- Notify the Captain that oxygen is required to be used
- Remove cylinder from stowage.
- Don cylinder.
- Ensure fitting of mask is attached to the flow outlet(s) specified by MedLink or decompression procedures.
- Turn dial slowly counter-clockwise to turn on flow of oxyen
- Test flow of oxygen by bringing the mask to your close to your face. Ensure it is odorless. Green portion of bag will be inflated.
- Secure mask over person’s face, using elastic strap.
- Secure oxygen cylinder using restraint sleeve.
- Monitor person’s condition and remaining oxygen levels every 15 minutes. The the condiition deteriorates contact MedLink.
- Discontinue use of oxygen at 500 PSI to maintain flight attendant reserve.
- Notify the captain if use of subsequent oxygen cylinder is required.
What type of decompression is a pressure leak?
Gradual
What do you do in the case of a slow decompression?
Notify the captain
Relocate passengers if required
What are the signs of a pressure leak?
Loud squealing or hissing around door
Subtle and slow signs of physiological effects
What are the 7 steps to after use of first aid oxygen?
- Remove mask from passenger
- Turn off oxygen by turning dial clockwise.
- Detach mask from fitting, place in a motion sickness bag and dispose of in garbage receptacle.
- Connect a new mask to HI flow outlet.
- Notify the captain that oxygen use has been discontinued and the remaining PSI level in the cylinder.
- Re-stow the oxygen cylinder
- Enter all used equipment into the Aircraft Cabin Log Book.
What is depressurization and what is it caused by?
A loss of cabin pressure caused by structural failure or aircraft system failure.
What is a gradual decompression?
Slow loss of pressure (leak) which may not be apparent until warning systems activate, resulting in subtle and slow onset of signs and physiological effects.
What is a rapid decompression?
An obvious loss of pressure generally caused by loss of aircraft systems resulting in noticeable signs and physiological effects.
What is an explosive decompression?
A visible and instantaneous loss of cabin pressure caused by structural damage resulting in instant signs and physiological effects.
What are the observable signs of a decompression?
Oxygen Masks drop Air becomes thin and cold Temperature changes rapidly Mist forms in the cabin Seat belt signs illuminate Loud noise and rush of air Unsecured objects or persons tossed around cabin Liquids in hot beverage containers and water doesn't boil
What are the physiological effects of decompression?
Hypoxia
Discomfort or pain in ears, sinuses, abdomen and joints due to pressure of gasses trapped in body
What are the physiological effects of hypoxia?
Difficulty in communication and co-ordination
Feeling daze, confusion or euphoria
What are the cabin crew procedures upon deployment of oxygen masks?
- Sweep nearest mask to face
- Occupy nearest seat and fasten seatbelt.
- Secure carts by applying brakes. Instruct ABPS to assist.
- Remain secured until given clearance by flight crew.
What is the Time of Useful Consciousness? (TUC)
The time available for an individual to preserve life by coordinated actions when deprived of oxygen at high altitudes.
What affects TUC?
Activity
What is the TUC at 15,000 ft
Indefinate
What is the TUC at 25,000 ft?
3-6 minutes
What is the TUC at 35,000 ft?
30 sec to 1 min
What is the TUC at 43,000 ft?
9 to 10 seconds