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Showing content with the highest reputation on 02/18/2023 in all areas

  1. The indication of coming out a pit/tiny from feathered position, indicates a good initial unfeathering electrical circuits as well as hydraulic pressure and routing. 1-Why not the prop continuing the unfeathering cycle? To me we should not track this issue; "Why not the prop continuing the unfeathering?" Based on: Quoting: angryjohnny The blades begin to come out of fleather just a tiny bit then go back to feather. So: the dome quad seals leakage, and the Aux. Feather Pump weakness, etc.. are not our issue. Our issue is: 2-Why the prop return back to feather and maybe up to the feather latch lock? Which indicates, another feathering circuit is become active (electrical/mechanical) causing the "feather valve" to be opened. A- Is it electrical feathering circuit malfunction? might be, but, some malfunctions can be seen by the (pulling-In) of the feather override button during the malfunction, which is not mentioned in your post. And some possibility of malfunctions is located in the valve housing, which already had been changed. So what is left? B- Mechanical feathering malfunction (NTS). The most likely As mentioned by: pjvr99 Quoting: Check out NTS function on the RGB. Note: Good NTS operation during air start should act momentarily (pushing the feather valve to open) at initial rotation of the prop but not before and not continued. If NTS malfunction (over-act, sticky) it will keep holding the feather valve opened thus routing hydraulic fluid towards feathering. So keep tracking the NTS malfunction.
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