3 ms·
Even if this is true (which I suspect it's not, I think being able to override trim in all positions is a certification requirement, but I could be wrong), disa
by lutorm 8y ago
Even if this is true (which I suspect it's not, I think being able to override trim in all positions is a certification requirement, but I could be wrong), disabling the trim just disables automatic trim. It's still possible for the pilots to manually move the trim wheel to trim back up.
- lsh123 8y agoManual trim is possible but at low near the ground one might not gave enough time.
- inferiorhuman 8y agoThe 737 can definitely be flown into a situation where the elevator doesn't have authority to overcome the stabilizer. That's been true at least since the 737 Classic. Take a look at the Bournemouth incident.
- bonzini 8y ago> Bournemouth incident Here: https://www.gov.uk/aaib-reports/aar-3-2009-boeing-737-3q8-g-thof-23-september-2007 https://www.gov.uk/aaib-reports/aar-3-2009-boeing-737-3q8-g-...
- lutorm 8y agoAh, interesting. That's nose-up, which is the opposite direction of what we're talking here, and seems to indicate that it is the combination of max thrust at low airspeed and large nose-up trim that exceeds the elevator authority. It's not immediately clear, at least from my skimming of the report, whether a similar situation exists for nose-down trim, since in that case thrust will help the elevator with pitching up.