Thread: CRJ200 question
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Old 09-14-2008 | 10:46 PM
  #15  
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sandlapper223
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From: More Drag
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Originally Posted by cessna157
To further confuse the Boost pump issue, I once got a "L Fuel Low Press" caution message, neither boost pump came on, and the engine did not flame out. I'll let you scratch your head about that. And no, I don't believe the fuel pressure switch is like the oil pressure switch (pressure readout vs warn msg)
Now let’s not confuse the issue.

Let’s see, L(R) FUEL LO PRESS master caution illuminates at 5 psig to indicate that a low fuel pressure condition (at the engine inlet) has been detected. During which phase of flight and under what conditions did you experience this?

And… to reply to other posts…

Just to be clear, there is no AUTOXFER FAIL caution, advisory, status, or other message if that is what you were getting at. L(R) XFLOW SOV FAIL or XFLOW/APU PUMP master cautions are related to “failures” of the automatic crossflow operation.

BOOST PUMPS. Breakdown L(R) Fuel Boost Pump Switchlights:

Pressed In – For engine starts, both boost pumps are activated (“ON” light illuminates). With engines running, (“ON” light extinguishes with sufficient fuel pressure), boost pumps remain armed and automatically come on when low fuel pressure is detected in any engine feed line. Switchlights show ‘ON’ when pumps are operating.

Pressed out – The boost pumps are disarmed.

INOP light illuminates when:

1. Low boost pump pressure (engines off),
2. Boost pump not armed (engines running), or
3. Has failed.

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