As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT ON FLT 581 ATL-CUN, NR 1 FCU (FLIGHT CONTROL UNIT) WENT INOP.UNIT WAS DEFERRED PER MEL 22-81-01 ON GND IN CUN. IN ORD ON 5 AUG 03, REPLACED FCU IAW AMM 22-81-12-401 AND ALL SYSTEM CHECKS PERFORMED GOOD. AIRCRAFT RETUNED TO SERVICE. NOTE REVISED "DIFFICULTY DATE" ON AUGUST 12,2003; DATE WAS 05/05/2003, SHOULD READ 08/05/2005.