Boeing Evacuation Procedures !
Thread Starter
Joined: Feb 2005
Posts: 163
Likes: 0
From: TANZANIA
Boeing Evacuation Procedures !
Hi,
With SAA the drill for evacuation calls for
ENGINE FIRE SWITCHES - Override Pull and Rotate
That means even if there is no fire you just fire the bottles.
Now someone told me this has changed and now you fire if there is fire ONLY !
Is this true ?
Zenj
With SAA the drill for evacuation calls for
ENGINE FIRE SWITCHES - Override Pull and Rotate
That means even if there is no fire you just fire the bottles.
Now someone told me this has changed and now you fire if there is fire ONLY !
Is this true ?
Zenj
Joined: Mar 2000
Aviation Qualifications: ATP+Mil
Posts: 1,428
Likes: 38
From: Long ago and far away ......
There probably isn't much point in firing the engine fire extinguishers if you are evacuating because of a fire in the toilet!
Pulling the fire handles makes sense as these bits of kit do a lot more than most realise.
On the B777, when the Engine Fire Switches (still look like handles to me!) are in the normal position they are mechanically locked in place until either an associated engine fire warning or an associated Fuel Control Switch is set to cutoff. (A Fuel Control Switch at cutoff also ensures the passenger door flight locks are unlocked.)
(There is also an override switch that unlocks the Engine Fire Switches if you wish to use it without the above 2 conditions.)
Once pulled, the Engine Fire Switch:
Pulling the fire handles makes sense as these bits of kit do a lot more than most realise.
On the B777, when the Engine Fire Switches (still look like handles to me!) are in the normal position they are mechanically locked in place until either an associated engine fire warning or an associated Fuel Control Switch is set to cutoff. (A Fuel Control Switch at cutoff also ensures the passenger door flight locks are unlocked.)
(There is also an override switch that unlocks the Engine Fire Switches if you wish to use it without the above 2 conditions.)
Once pulled, the Engine Fire Switch:
arms the engine extinguishers
closes the engine and spar fuel valves
closes the engine bleed valves
trips the generator
shuts off the hydraulic fluid and depressurises the hydraulic pump
removes power to the thrust lever isolation valve
closes the engine and spar fuel valves
closes the engine bleed valves
trips the generator
shuts off the hydraulic fluid and depressurises the hydraulic pump
removes power to the thrust lever isolation valve
Thread Starter
Joined: Feb 2005
Posts: 163
Likes: 0
From: TANZANIA
Yes its true pulling fire handles is a better option but im not sure if the new procedures that we are talking of call for it or just leave them as they are !
Thanks for feedback from all of you
Zenj
Thanks for feedback from all of you
Zenj
Joined: Mar 2000
Aviation Qualifications: ATP+Mil
Posts: 1,428
Likes: 38
From: Long ago and far away ......
The evacuation checklist for the B777 I fly calls for, amongst other things:
Engine Fire Switches (both) - Pull
(if required) - Rotate
Its been that way for at least 2 years. The judgement call is left to the crew i.e. do you need to reduce a potential or existing fire risk in the engines?
Engine Fire Switches (both) - Pull
(if required) - Rotate
Its been that way for at least 2 years. The judgement call is left to the crew i.e. do you need to reduce a potential or existing fire risk in the engines?
Joined: Jun 2004
Posts: 2,202
Likes: 4
From: Surrounding the localizer
Identical on the 757/767 as Mr B describes....just out of interest, how long when on the ground do you wait till letting off the second charge? (we use 10 seconds...so the 1st charge gets a chance to do its work)
