How do you raise your credit rating(quickly)?

[Jamesthomeson]

The game was just reset in like what, maybe 3 days ago yet I'm still struggling with my credit. It's the starting stages and I expect to be at a low point for a while but I see other airlines with fleets much larger than mine with "A" and above credit scores. 

Does anyone know how I can get my airline like this?

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Also I think I put this thread in the wrong topic. ?