As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND LEFT ENGINE FIRE WARNING ILLUMINATED WITH APU RUNNING AND ENGINE OFF. FIRE DETECTION CONTROL UNIT CAUSING INTERMITTENT FIRE WARNINGS. LONG BEACH CESSNA SERVICE CENTER REMOVED AND REPLACED THE LEFT ENGINE FIRE WARNING CONTROL UNIT. OPERATIONAL TEST PERFORMED AND AIRCRAFT RETURNED TO SERVICE. (M)