Unscheduled electric elevator trim
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Hi all, in the emergency procedures of my POH there is also this one: "Unscheduled electric elevator trim". This is the textual description:"Incorporated in the system is an emergency release button located on the left handle grip of the pilot’s control wheel. This button can be depressed to deactivate the system quickly in case of a malfunction in the system. The system will remain deactivated only while the release button is being held in the depressed position".
This is the procedure:
1.Airplane Attitude …………. MAINTAIN (using elevator control)
2.Trim Release (under pilot’s thumb adjacent to control wheel trim switch) ……….. HOLD IN DEPRESSED POSITION
3.Trim ……………… MANUALLY RETRIM AIRPLANE
4.Electric Trim …………………………… OFF
5.Trim Release ………………….. RELEASE
6.Circuit Breaker …………………….. PULL
NOTE: Do not attempt to operate the electric trim system until the cause of the malfunction has been determined and corrected.On the control wheel there isn't this button. Is this procedure still foreseen or not? Regards.
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I found the POH online that I believe this procedure is from, and it describes a 1970's Baron. I see no reference to this system in the late model Barons after the 1984 redesign. If I'm reading between the lines correctly, I think this is also an antiquated safety system, which requires the pilot to manually disable the autopilot and/or trim servos via another switch on the panel while simultaneously holding the disconnect switch, as the yokes equipped with this trim disconnect button do not have the now common two-stage AP/FD disconnect button. I imagine this is still somewhat common in 60's and 70's airplanes today, but I have yet to encounter one. You learn something new every day!
