valve remains open after A320 eng. Start?
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the outflow valve is represented in a "box" with the inlet/outlet valve and the 2 pressurisation system (SYS1 or 2)
this is on the lower ecam.
the start up valve is represented on the ecam as well, when engine is in start position.
it' s a circle with a dash inside, the dash line is at 90 degrees when in the closed position.
You have to monitor his opened and closed position when the engine start, as well as N1/N2 and fuel consumption.
it's called the engine start valve, can become a manual valve when you are "in manual", if not, it is automatic.
This valve opens to "boost" the compressor from the APU and /or from the other engine. Once the engine starts, the valve closes. If the valve doesn't close, you have to check in the FCOM which will probably say to retry a full restart, if not, start and close manually the valve until next visit.
this is on the lower ecam.
the start up valve is represented on the ecam as well, when engine is in start position.
it' s a circle with a dash inside, the dash line is at 90 degrees when in the closed position.
You have to monitor his opened and closed position when the engine start, as well as N1/N2 and fuel consumption.
it's called the engine start valve, can become a manual valve when you are "in manual", if not, it is automatic.
This valve opens to "boost" the compressor from the APU and /or from the other engine. Once the engine starts, the valve closes. If the valve doesn't close, you have to check in the FCOM which will probably say to retry a full restart, if not, start and close manually the valve until next visit.
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Skin Air Extract Valve, now that sounds more like something we have on the A320.
The position of this valve is indicated on the SD under Press. .
It opens or closes depending on whether you are on ground or in the air and the thrust lever position as well as the outside air temperature. The associated ECAM warning is SKIN VALVE FAULT and there is a MEL procedure for it.
Also as LEVEL600 said the Skin Air Extract Valve is not expected to close after engine start. If it was open on ground, it should close once airborne.
Having said this I highly doubt, that the original poster was thinking this far.
The position of this valve is indicated on the SD under Press. .
It opens or closes depending on whether you are on ground or in the air and the thrust lever position as well as the outside air temperature. The associated ECAM warning is SKIN VALVE FAULT and there is a MEL procedure for it.
Also as LEVEL600 said the Skin Air Extract Valve is not expected to close after engine start. If it was open on ground, it should close once airborne.
Having said this I highly doubt, that the original poster was thinking this far.
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Please do all read the first post: (...A320...)
Obviously we are talking about the start valve. If it stucks open, there will be a slight increase in fuel consumption, but the engine will work normally. Another thing is the aplicable procedures in such case. Technically, the A/C can fly tlike that, but on the next "bus stop" you will change the starter guaranteed. And that is if parts of the starter don't get into other areas of the engine.
Conclusion: If this happens, shut it down, have the start valve replaced or operate it manually
Obviously we are talking about the start valve. If it stucks open, there will be a slight increase in fuel consumption, but the engine will work normally. Another thing is the aplicable procedures in such case. Technically, the A/C can fly tlike that, but on the next "bus stop" you will change the starter guaranteed. And that is if parts of the starter don't get into other areas of the engine.
Conclusion: If this happens, shut it down, have the start valve replaced or operate it manually
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smudgethecat and elk343 have it correct,
Remove all sources of bleed first, per the check list procedure, then shut down the engine. Failure to do so could cause serious damage to the pnuematic starter, (If it hasn't been already damaged)
Remove all sources of bleed first, per the check list procedure, then shut down the engine. Failure to do so could cause serious damage to the pnuematic starter, (If it hasn't been already damaged)
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Bottom Line
Any start valve, on any turbine engine to my knowledge must be verified closed by the published MMEL's I have an understanding of with a lack of closed indication.
Just about all I know of are on a main bleed air system and could potentially run the starter moter to a catastrophic failure "not Good"
The RPM of these motor's is extremely high and can cause severe secondary damage to the engine and any bleed/hyd/elec systems in the vicinity.
Just about all I know of are on a main bleed air system and could potentially run the starter moter to a catastrophic failure "not Good"
The RPM of these motor's is extremely high and can cause severe secondary damage to the engine and any bleed/hyd/elec systems in the vicinity.
