Occurrence
On 12 August 2019, during the takeoff roll at Düsseldorf Airport (EDDL), the flight crew of a Boeing 737-400 observed the MASTER CAUTION warning with an "ENG" indication after engine stabilization but before pressing the TO/GA button. The crew quickly assessed the situation and decided to abort the takeoff due to the illumination of the PMC INOP (Power Management Computer Inoperative) warning for engine number 2. The aircraft returned to stand V43 and technical services were called.
Technical Response
After waiting 1 hour and 30 minutes for technical support, it became apparent that neither of the two handling companies at the airport had a licensed technician qualified on the Boeing 737-400. Following consultation with the airline's operations control center (LOT OCC), the decision was made to cancel the flight. Technical personnel arrived from Warsaw and identified a fault in the Power Management Computer (PMC) that controls engine power. Since the system's functionality was ensured by an alternative backup system and there was no direct threat to flight safety, the maintenance team cleared the aircraft for service.
Cause
The cause of the incident was identified as a malfunction of the Power Management Computer (PMC). The incident resulted in no injuries among the 115 occupants (passengers and crew).
Aftermath
No preventive actions or safety recommendations were formulated by the investigating entity or the State Commission on Aircraft Accident Investigation.