Cold weather King Air ops

I think the boss would want a PL 350 before putting more into our 300...What a hot rod it would be, though!
 
In regards to the OP, we had a motive flow valve freeze up trying to leave Canada once...Got the light, went back, put it in a hangar for 8 hours, problem solved!
 
Agreed, with our mission the 350 wont work, we need to operate under 12500, if you know what I mean ;-)
 
bucksmith said:
We actually drained all 6 drains on each side (can you find all 6? I can, now :) and found no water. It was still our maintainers best explanation for it being stuck shut...
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Well there's no moving parts. The only way for motive to not work is if there's no fuel going past it from the pumps or it's blocked.
 
z987k said:
Well there's no moving parts. The only way for motive to not work is if there's no fuel going past it from the pumps or it's blocked.
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There is a valve that closes when the aux tank is empty. If the valve is "closed" despite there being fuel in the aux, we get a light.
 
deadstick said:
Isn't the light on if there is fuel in thank and the pressure switch is not registering 10 psi?
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The 10psi is for the the primary boost pump. That gives you the red fuel press light.
Not sure what the value of the pressure switch is downstream of the motive flow valve, but yes that's correct.
If the logic sees no pressure there and sees fuel in the aux, you'll get a yellow no fuel xfer light.
Flip the aux override switch to bypass the black box in attempt to open the valve manually.
 
I can't remember if there is a limitation on a King Air, but on a Citation the cabin must be above freezing for at least 20 minutes if carrying passengers for proper deployment of the emergency oxygen system.
 
MikeOH58 said:
I can't remember if there is a limitation on a King Air, but on a Citation the cabin must be above freezing for at least 20 minutes if carrying passengers for proper deployment of the emergency oxygen system.
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I don't think so. I've never heard of that on the King air, and you would think that'd be something the'd bring up since it's often well under 0C here. The pax o2 is either manually deployed via a physical linkage or via a baro sensor and mechanical linkage.
 
z987k said:
I don't think so. I've never heard of that on the King air, and you would think that'd be something the'd bring up since it's often well under 0C here. The pax o2 is either manually deployed via a physical linkage or via a baro sensor and mechanical linkage.
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Or in heavy turbulence! Rubber jungle when crossing the mountains.
 
-40C for starting and blowing the boots are the only ones I recall.

z987k said:
I don't think so. I've never heard of that on the King air, and you would think that'd be something the'd bring up since it's often well under 0C here. The pax o2 is either manually deployed via a physical linkage or via a baro sensor and mechanical linkage.
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Definitely check that the valve opens. It has been known to freeze.
 
deadstick said:
-40C for starting and blowing the boots are the only ones I recall.



Definitely check that the valve opens. It has been known to freeze.
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We just leave the pilot O2 on, the pax will be fine even if theirs doesn't work in the 45 seconds it takes to go from FL280 to 10,000.
 
I read it as leaving the ARM handle pulled. We do the same. Ours does a good job of not leaking, but we still check the flow.

Just don't pull the one that drops the rubber jungle and makes the mechanic curse you for a month.
 
Got it
deadstick said:
I read it as leaving the ARM handle pulled. We do the same. Ours does a good job of not leaking, but we still check the flow.

Just don't pull the one that drops the rubber jungle and makes the mechanic curse you for a month.
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ohh, got it...I would hate to run down our bottle, I feel like it MUST leak somewhere..:)
My routine is to always push the one on the right before I pull the one on the left.

There are a couple of "fun" ways to drop those masks..can you guys hold a 12k' cabin with the bleed air switch on low?
 
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