I did a search on the forums and didn't come up with any threads on this, and didn't see it in the compiled list of bugs, so forgive me if it's already been reported.
Essentially you can have more aircraft than the aircraft capacity limit of a city.
Steps to reproduce:
Have a city with NO airport. (may work with an airport as well, haven't tried)
Rebase 4 aircraft into the city. (city is at it's limit)
Move an empty Carrier into the city.
Rebase 3 fighters / jet fighters into the city.
Move carrier out of city.
It allows you to rebase the 3 fighters into the city even though the capacity is maxxed because it is trying to allow you to put them on the Carrier. However, when the carrier is in the city it rebases the fighters into the city itself, Not into the carrier's cargo space.
I have not done further testing so am not sure if this works to get More than 8 fighters in a city as well, however it seems like it would work.
Notice in the screenshots 5/4 limit, and inside the city no airport.
Essentially you can have more aircraft than the aircraft capacity limit of a city.
Steps to reproduce:
Have a city with NO airport. (may work with an airport as well, haven't tried)
Rebase 4 aircraft into the city. (city is at it's limit)
Move an empty Carrier into the city.
Rebase 3 fighters / jet fighters into the city.
Move carrier out of city.
It allows you to rebase the 3 fighters into the city even though the capacity is maxxed because it is trying to allow you to put them on the Carrier. However, when the carrier is in the city it rebases the fighters into the city itself, Not into the carrier's cargo space.
I have not done further testing so am not sure if this works to get More than 8 fighters in a city as well, however it seems like it would work.
Notice in the screenshots 5/4 limit, and inside the city no airport.