As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT OZONE CONVERTER INOP DUE TO LT PACK LWR FLOW CONTROL VALVE DEACTIVATED CLOSED. OZONE CONVERTER HAS BEEN DEFERRED IN COMPLIANCE WITH MEL CARD 21445. DF931 FOR LT PACK LOWER FCV CLEARED. REOPENED ON 18MAY10 FOR: LOWER FCV FAULT CAME BACK DF931. PERFORMED FAULT ISOLATION PROCEDURE FIND CTC FAULTED REPLACED CTC, CKS OK.