What was found
DURING CRUISE LEFT FORWARD EMERGENCY DOOR EICAS MESSAGE ILLUMINATED AND REMAINED ON FOR DURATION OF FLIGHT. POST FLIGHT, LINE MAINTENANCE REPORTED PSEU BITE CHECK GOOD PER B767 FAULT ISOLATION MANUAL 32-09-00/101. NO FAULTS FOUND. FOR ADDITIONAL TROUBLESHOOTING, FAULT TRANSFERRED TO DEFERRAL MAINTENANCE ITEM 49812 PER ATI B767 MINIMUM EQUIPMENT LIST 52-71-01-01. LEFT FORWARD EMERGENCY DOOR VERIFIED CLOSED, LATCHED AND LOCKED. AIRCRAFT RESUMED SERVICE. DOWNLINE, LEFT EMERGENCY DOOR WARNING SWITCH REMOVED AND REPLACED IAW B767 AMM 52-71-00. OPERATIONAL TEST SATISFACTORY. DEFERRAL MAINTENANCE ITEM 49182 CLEARED.