Originally Posted by
sandlapper223
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.
My comment about AUTOXFER FAIL was kind of a joke not related to anything fuel but electrical. I remember a lot of guys were confused by AUTOXFER FAIL and AUTOXFER OFF back in the day. Again though, this is all from memory from a long time ago. However, it shows you how much they made you know back in the day to think it's still with me. There is very little I remember about the 737-200 but a CRJ I can talk all day long. Many a late night candle was burned for the airplane when in initial and upgrade.