What was found
FIRE DETECTION WARNING LIGHT ILLUMINATED DURING FLIGHT (FLIGHT ILLUMINATION). THERE HAVE BEEN SEVERAL PREVIOUS OCCURRENCES (SEE SUBMITTED SDR'S). THE NR 2 AFT, INBOARD, FIRE DETECTOR WAS REPLACED AND DOCUMENTED ON LC-000973-75-16, DISC-000619-75-16. THERE HAVE BEEN NO FURTHER OCCURRENCES. SUPPLEMENTAL INFORMATION; THE DETECTORS IN THIS A/C HAVE BEEN REPLACED WITH P/N 477223 FLAME DETECTORS IAW COLUMBIA HELICOPTERS, INC. SERVICE BULLETIN NUMBER 107-26-S0004. DETAILS ARE ON FILE WITH OPERATOR CHIA823C.