As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DESCENDING THROUGH 9K HAD IB FLT SPOILERS CAUTION MESSAGE AND IB SPOILERONS CAUTION MESSAGE COME ON. INTERROGATED MDC FOUND "L IB MFS PCU JAMMED" MDC MESSAGE. PERFORMED SPOST1 RESET, PERFORMED OPS CHECK IAW ETN CR-27-093, OPS CHECKED GOOD.