Fly Lah!

Here i create this topic for those who wants a simple answer and no too detail.
So,enjoy posting here.

I need to know method of how to shut down an aircraft engine.Maybe someone can helps me regarding this question.I just know it can be achieved by using these two methods:

1)by using fuel cut off valve.

2)by using fire extinguisher switch.

If someone wants to add some info, i appreciate it

I believe you are correct there....

Normally, to shut down... we use the start lever by placing it in the cut-off detent, the LPSOV will go to the 'close' position and cuts off the fuel supply. Using the fire extinguishing handle is only in "emergency" situations.

Cipkoyot wrote:I believe you are correct there....

Normally, to shut down... we use the start lever by placing it in the cut-off detent, the LPSOV will go to the 'close' position and cuts off the fuel supply. Using the fire extinguishing handle is only in "emergency" situations.

Thanks for your answer.

Anyway, is it true LPSOV will be take in action for the close position? i think it should be HPSOV because the control lever is control the HPSOV which is means to supply or cut off the fuel.

Well done ... repeating myself again, you are correct...been trying to find my old books in the storeroom...will post more when I have it. If the start lever initiates the LPSOV, then upon shutdown, the supply line upstream of the HPSOV would be empty and it may create a vapor lock...pardon the old engineer...trying to recollect the old systems and thank you for the topic to jog the memory.
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Best wishes and regards.

who's our moderator now ??

No specific moderator for this specific thread.
Any Global Moderator will be I guess

kracemas_090 wrote:who's our moderator now ??

Download CAP 468: BCAR Section L - Licensing here:

http://www.caa.co.uk/application.aspx?c ... tail&id=54

As former professional Flight Engineer, I think your question is relative to Gas turbine engines.
- We normally shut down the engine by the HP cock
- The Low pressure cock is related to the fire and emergency procedures. We normally never close it
The reasons are:
- the distance between the LP cock and the injectors can be important, the closure by the LP has not an immediate effect (waiting time can be up to 1 minute+: it can be dangerous),and it is not a good practice to empty the HP line, at the next start up, the HP system will be dry during a short while. On contrary, the HP cock is closest to the injection. The HP cock is after the HP pumps and, when closed, maintains some lubricating fuel inside HP components.
Regards
Terengganu01

Terengganu01 wrote:As former professional Flight Engineer, I think your question is relative to Gas turbine engines.
- We normally shut down the engine by the HP cock
- The Low pressure cock is related to the fire and emergency procedures. We normally never close it
The reasons are:
- the distance between the LP cock and the injectors can be important, the closure by the LP has not an immediate effect (waiting time can be up to 1 minute+: it can be dangerous),and it is not a good practice to empty the HP line, at the next start up, the HP system will be dry during a short while. On contrary, the HP cock is closest to the injection. The HP cock is after the HP pumps and, when closed, maintains some lubricating fuel inside HP components.
Regards
Terengganu01

Thanks for your answer.

So, we can make the conclusion the LP cock is just used in emergency situaton?
How about the other functions?