What was found
AMF FLT# 6905 EXPERIENCED A LH ENGINE FLAMEOUT AT 1500 FT DURING CLIMB, DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. SJU MAINTENANCE TROUBLESHOT STARTING L/H ENGINE NORMALLY AND FOUND L/H ENGINE BYPASSING AND SURGING IN IDLE WITH NO OTHER INPUTS. DURING TROUBLESHOOTING FOUND THAT THE L/H SRL INTERFACE WAS CAUSING THE SURGE AND BYPASS ISSUES. REPLACED SRL INTERFACE BOX AND RAN L/H ENGINE FROM IDEL TO TAKEOFF POWER AND SYSTEM FUNCTION CHECKED GOOD. THEN AN OPERATIONAL CHECK FLIGHT OF AIRCRAFT WAS COMPLETED AND L/H ENGINE PARAMETERS WERE FOUND NORMAL.