B767-300 and 300 ER
Flight Crew Air Transport Pilot (ATP)
Other / Unknown
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Aircraft; Human Factors
At the completion of the test flight; the right engine was shutdown using the Engine Fire Switch per the test flight checklist during the taxi in. Upon parking the aircraft at the gate; I instructed the FO to continue with the test flight checklist Fire Switch Engine Shutdown per the checklist. As he pulled the left engine fire switch; I noted the drop in EGT and the ENGINE SHUTDOWN ECIAS message and then I turned off the beacon. While the FO continued the required checks for this task; I diverted my attention to the surrounding activities. I began talking to the maintenance personnel (at the nose) on the intercom to release parking brake as the stairs were brought up; asked our onboard maintenance technician to open the cockpit door; and then conducted the normal overhead shutdown flow. I do not recall switching off the engine fuel switches nor do I recall if they were on or off during my shutdown flow. If the checklist was followed properly; both the fuel switches and the fire switches should have been off/in. Before vacating the seat; a normal shutdown checklist was completed and I began making aircraft logbook entries. As normal; several maintenance folks entered the cockpit for a debrief. One of the technicians that was on the ground; stated that the left engine shutdown sounded abnormal. At that time we scanned the engine instruments and noted that the left engine EGT had latched an overtemp. Myself; the FO and the onboard technician stated that the shutdown appeared normal in the cockpit. At that time; I entered the overtemp into the aircraft logbook.Unknown [cause]. Speculation is that the FO may have reset the fire switch before turning off the engine fuel switch. If this happened as a result of the FO resetting the fire switch prematurely; the event can be easily prevented by following the approved checklist.
During taxi in; after the completion of a test flight; the right engine is shut down using the fire switch. At the gate the First Officer is instructed to shut down the left engine using its fire switch; which was accomplished. A Maintenance Technician that was on the ground during the shutdown stated that the shutdown sounded abnormal. It was then noted that the left engine EGT had latched an overtemp.