What was found
AT 340 (FL) FIRE WARNING FWD PIT, DECLARED EMERGENCY , STARTED DECENT TO KSTL, FIRE WARNING STOPPED AROUND FL 250, CONTINUED KSTL AND LANDED CORRECTIVE ACTION & OTHER PERTINENT INFORMATION: R&R SDU BATTERIES S/N E16238 IAW SECURA PLANE TECH. AMM SUP 26-15-01, OPS CHECK IAW SECURA PLANE AMM SUP 26-15-00-7 OPS CK GOOD, NO DEFECTS. R&R CENTRAL CONTROL UNIT IAW SECURA PLANE TECH AMM SUP 26-15-01-2 OPS CK GOOD AT THIS TIME.