The Phantom Problem

Sometime in late June, we undertook a troubleshooting job onboard MV Aargau in Sarawak, Malaysia. It was reported that AE#2 unexpectedly disconnected by itself without any operator action. The main challenge with this problem is its randomness. It happened 3 times over the past 6 months. Unfortunately, during this service job, we were unable to replicate nor witness the problem. Therefore, we could only rely on information that was reported by the crew. The problem happened only to AE#2. The MSB was using DEIF PPUs and ABB PLC for power management system control. It was reported that the unexpected disconnection happened when the MSB was in semi-auto mode. It is not usual for automatic disco

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