What was found
INVESTIGATED REPORT OF LT ENGINE IGNITION SYS STAYING ACTIVATED AFTER ENGINE START SEQUENCE COMPLETED. VERIFIED COMPLAINT, FOUND LT ENGINE IGNITION STANDBY POWER RELAY 80K7 FAILED. REPLACED RELAY WITH NEW RELAY, IGNITION SYS OPERATIONS NORMAL. HAVE NOTED THIS RELAY AND IGNITION POWER RELAYS 80K4, 80K6, AND RT IGNITION STANDBY POWER RELAY 80K8 TO FAIL OFTEN, FREQUENTLY WITH LOW TIME IN SERVICE, IN 390 SERIES ACFT. FAILURES ARE OFTEN CAUSING FAILED START ATTEMPTS OR OTHER IGNITION SYS FAULTS.