3 ms·
> Its been noted in previous discussions that while it would be difficult, the load can be overcome if both pilots were to operate the manual trim wheel at the
by cjbprime 8y ago
> Its been noted in previous discussions that while it would be difficult, the load can be overcome if both pilots were to operate the manual trim wheel at the same time.
I haven't seen that noted anywhere, and have seen it theorized as impossible without motor assist, given their airspeed and with the elevator opposing. Got a link?
- deleted 8y ago[deleted]
- swhitt 8y agoManual Stabilizer Trim Excessive airloads on the stabilizer may require effort by both pilots to correct the mis-trim. In extreme cases it may be necessary to aerodynamically relieve the airloads to allow manual trimming. Accelerate or decelerate towards the in-trim speed while attempting to trim manually. https://www.pilot18.com/wp-content/uploads/2017/01/B737NG_FCTM_31-10-05.pdf https://www.pilot18.com/wp-content/uploads/2017/01/B737NG_FC... page 312 (8.16)
- cjbprime 8y agoTo be clear, that's a link that agrees with me that it can be impossible, not a link that says they just needed to work harder. It's also from a 20 year-old manual, and isn't present on newer manuals, and pilots haven't trained on it in decades. Not appropriate to expect pilots to know, and possibly not helpful here: the pilots were low altitude, so allowing the nose to drop even further (to relieve aerodynamic load) may have been deadly too.
- swhitt 8y agohttps://www.satcom.guru/2019/04/stabilizer-trim-loads-and-range.html https://www.satcom.guru/2019/04/stabilizer-trim-loads-and-ra... does a pretty good job of summarizing it I think. It sounds incredibly difficult to do.