As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PERFORMED FIM TASK 33-50-F-P2A-421A-A. FOUND 6 WCUS INACTIVE. WCUS REQUIRE KEY TRANSFER IAW AMM 33-51-07-06-950A-A. SWAPPED WCU 1 AND 13. THAT CLEARED FAULTS AT 30 AND 17. REPLACED WCU AT 9.2, 21,13 AND 23. LOADED SOFTWARE. SYSTEM OPS CHECK GOOD. IAW AMM 33-51-07.