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·  Use the water glycol fire extinguisher or any other available liquid to extinguish the fire
·  A blanket or pillow may be used the smother the fire
·  After extinguishing the fire, use the crash axe on the seat to get to the source of fire by
whatever means are available
Section 3:Emergency Procedures December 2001
Issue 1
3-10
3.6 DECOMPRESSION
3.6.1 General
The pressurization system of the aircraft is used to create a more dense atmosphere within the
cabin so that crew and passengers are kept comfortable and continue to breath normally.
Decompression occurs whenever cabin altitude exceeds the preset altitude in an uncontrolled
way. It could be slow, at which time remedial action such as descent to a lower level is taken,
with little chance of causing damage to the cabin or its occupants. Cabin crew may be aware of a
slow decompression if the oxygen masks drop down. In this event it is essential for cabin
crewmembers to grab an oxygen mask and put it on regardless of how normal cabin conditions
may appear. However, due to various technical, structural or sabotage reasons, a rapid
decompression might occur and will require an emergency descent by the flight deck crew and
immediate action by the cabin crew.
3.6.2 Rapid Decompression Objective Signs
There is always a remote possibility of a rapid loss of cabin pressure in any pressurized aircraft.
The signs of rapid decompression are:
·  A rush of air
·  Loud bang
·  Rapid drop in temperature
·  Cabin filled with dust, debris, loose objects
·  Noise level will increase considerably
·  Moisture will condense in the form of fine mist
3.6.3 Rapid Decompression Subjective Signs
The effects of rapid decompression could be serious to crew and passengers in a few seconds.
The physiological effects on a person are due to a lack of oxygen and the expansion of gases
trapped in the body cavities following the fall in pressure. They are usually accompanied by the
following signs, which might be of short duration but are still dangerous:
·  There is a sudden expansion of the chest and air is blown out though the nose and mouth
causing difficulties in breathing
·  Cold sensation
·  Sinuses and ears may feel full momentarily
·  Speaking will be more difficult
·  Abdominal distension sufficient to cause discomfort or pain
3.6.4 At Decompression
·  Flight deck crew should accomplish the emergency procedures for decompression
/emergency descent
Section 3:Emergency Procedures December 2001
Issue 1
3-11
·  Cabin crew should put on the nearest available oxygen mask, sit down, and fasten seat belt or
hold on
3.6.5 Immediately Following Decompression
·  Flight deck crew should advise the cabin crew that emergency descent is over
·  The PIC should call the Lead Cabin Crewmember to the flight deck to get a preliminary
briefing on the situation in the cabin
·  Cabin crew should transfer from drop mask to portable oxygen bottles, if required
·  Cabin crew should assist passengers as required (administer oxygen, first-aid, blankets, etc.)
·  Ensure the ‘No Smoking’ sign is respected.
·  Keep door areas clear
·  Report any injury or damage to the Lead Cabin Crewmember who will report it to the PIC
The following procedures should be committed to memory:
·  Cabin crewmembers should make an announcement after notice from the flight deck crew -
wait for notification before attempting to reach a microphone
·  Do not remove oxygen mask; put mouthpiece to side of mask and speak loudly
Four points should be covered:
- Fasten seat belt
- Use of supplemental oxygen mask
- Stay on oxygen until further advised
- No smoking
An example of the decompression PA would be:
“Ladies and Gentlemen, fasten your seat belts, pull down on the mask in front of and the oxygen
flow will start automatically. Place the mask over your nose and mouth and breathe normally.
Take the elastic band and place it over your head. Pull the elastic tab on either side of the mask
to tighten the band. Put your mask on then assist those around you with their masks. Use mask
until further advised. Absolutely No Smoking!”
NOTE: PA’s are only to be made if a cabin crewmember can safely reach the handset at
the time of the decompression. If the cabin crewmembers are in the cabin at the time of
the decompression the commands should be shouted to the passengers without removing
　
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