Comment by daemonologist

To expand on #2, the loss of hydraulic pressure also caused the uncommanded retraction of the leading edge slats on the left wing, which was found by the NTSB to be part of the probable cause. Full report is here (PDF): https://www.ntsb.gov/investigations/AccidentReports/Reports/...

(I do not mean to imply that this exact slat retraction is necessarily relevant in the Louisville crash, however - I believe aircraft since AA191 are designed to maintain their wing configuration after loss of hydraulic pressure.)