The Engine Diagnostic System, designed specifically for the TPE331 engine, consists of a module of four annunciator lights that will advise the pilot if a specific abnormal operating condition occurs for either engine. The system is designed to provide indications of both ferrous and non-ferrous particles that may be the first indication of an imminent or catastrophic engine failure.

The Oil Filter Bypass lights illuminate to indicate that the respective oil filter has bypassed. There is a sensor mounted on the side of each engine to detect an obstruction to oil flow, thereby allowing the pilot to take timely, appropriate action, according to his flight situation, thereby ensuring safety of flight and precluding possible engine damage.

There is also a pair of annunciator lights for the chip Detector Light System. If a fine metallic part is drawn to the engine mounted, magnetic sensor, the respective annunciator will illuminate and once again advise the pilot of a possible problem. This will alert the pilot to take corrective measures immediately and coordinate maintenance prior to the next scheduled check. This feature not only will enhance safety of flight, but could also result in tangible maintenance savings.