If you’ve discovered at the airport that your baggage is damaged, you need to report damaged baggage to the airport Baggage Service Officer immediately after the flight.
Please note that you will need to report the weight of your checked baggage (see your luggage slip) and the weight of your baggage received upon arrival. The weight difference is to be claimed for compensation.
According to the Warsaw Convention, the carrier’s liability for the damage to your checked baggage is limited to $20 per kg per passenger.
As to damages to baggage caused intentionally (lock break or theft), airlines will compensate for the lost or damaged belongings in accordance with general practices.