You should probably attempt these in the given order:
0.5. If the broken bag is small enough compared to the new one, place it within the new bag
1. Ask security
2. Ask your airline personnel
3. Leave the suitcase open and as obviously empty as you can make it next to a bin with a piece of paper that says "TRASH" or equivalent
- If the broken bag is small enough compared to the new one, place it within the new bag
- Ask security
- Ask your airline personnel
- Leave the suitcase open and as obviously empty as you can make it next to a bin with a piece of paper that says "TRASH" or equivalent