Oh, jeez, is Norwegian still playing the oil hedging game? I forgot about that. If so, I take back my comments about fuel helping them. These guys manage to get everything wrong. Brent crude fell another 3 bucks today. That will cost them a lot of money.
As far as the planes being full, that's pretty meaningless. Air Berlin's planes were full. As are most failing airlines. Unless you're flying 777s to Peoria, you can usually sell all your inventory. The hard part is selling it for a profit. I also don't understand why an airline would sell at a loss when their planes are full, but it's common.