3 ms·
Standby PCU sounds like a control system. Was that a cause or effect of the event?
by HPsquared 2y ago
Standby PCU sounds like a control system. Was that a cause or effect of the event?
- banannaise 2y agoThe PCU in this context is the part that moves the rudder. PCU issues were common on the 737 in the 90s[0] although that's... probably?... not relevant here. [0] https://en.wikipedia.org/wiki/Boeing_737_rudder_issues https://en.wikipedia.org/wiki/Boeing_737_rudder_issues
- HPsquared 2y agoExactly, rudder control issues could trigger or exacerbate Dutch roll. Loss of yaw damper control, in other words (yaw damper actuates the rudder).