Alt Pitch Trim still work if all hyd sources got cut?
Hi,
This is in relation to the B777. As FCOM 2 states,
"The alternate pitch trim levers are linked to the stabilizer trim control modules (STCM) via control cables, and then mechanically to the stabilizer."
"The center and right stabilizer cutout switches, located on the aisle stand, control hydraulic power to the respective stabilizer trim control module. Placing both switches in the CUTOUT position removes all hydraulic power from the stabilizer."
If STCM instructs hyd sources cutoff, there's still a mechanical link? So in the event L and R Hyd sources got cut off (STAB CUTOUT SWITCHES ARE PUT TO CUTOUT), Alt pitch trim levers can still control the stabilizer via cables? More importantly, does the STAB CUTOUT switches disable stab movement via mechanical link?
Can someone advise on this?
Last edited by extricate; 9th Sep 2017 at 05:04.