Lose power in port during maintenance.
Realign electric plant to get the lights on.
Get underway in a lineup that won’t support underway load.
Leave pier and start turning on more stuff, especially steering.
Overload diesel generator.
Lose power
Shut breaker without knowing why it tripped or dumping load.
Trip breaker again.
All the while propulsion diesel is dead.
Hit bridge.
It is far less complicated than that. Their maintenance crew was not qualified. Probably illiterate and couldn’t read the maintenance manual.