To repair the Train Station you need to obtain the Train Station Construction Blueprint.

This is one of the rewards for completing The Islanders 12/14: Train Station 5. There are 3 objectives in this quest:

• Upgrade your Farm beyond level 10,
• Have more than 2000 coins,
• Complete 1 Order on the Order Board

When the quest is complete, you should see the reward on your screen - like coins, points and the Train Station Construction Blueprint.

To help you to locate that quest, it comes right after two other quests that tell you to build the 'Bread Stove' or own your first '2 Cartoon of Eggs'.