What was found
NON-ETOPS FLIGHT 278 HNL-KOA, AT 5000 FT, THE CREW NOTED THE FLIGHT RECORDER OFF LIGHT ILLUMINATED. THE CREW RETURNED TO HNL WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE FLIGHT DATA ACQUISITION UNIT PER AMM 31-24-11 WITH ALL CHECKS SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.