18 Financial liabilities

The debenture of CHF 250.0 million (nominal amount) that matured in May 2017 was refinanced by placing a new, twelve-year debenture in the amount of CHF 350.0 million (nominal amount)

Also in financial year 2017, a total of CHF 1.7 million (2016: CHF 19.2 million) of the outstanding lease liabilities was repaid in accordance with the existing lease agreements.

Other current and non-current financial liabilities include bank loans taken out by the Chilean subsidiary A-port S.A.

Composition of non-current financial liabilities as at the reporting date:

External financing is subject to standard guarantees and covenants, which were complied with as at the reporting date.

In addition, unused credit facilities at the reporting date amounted to a total of CHF 238.5 million (see note 24.1 a) Financial risk management, ii) Liquidity risk).

The maturities of financial liabilities are shown in the table below:

Financial liabilities changed as follows as a result of cash and non-cash changes:

Overview of lease liabilities

The lease liabilities shown below primarily include the lease agreement for the aircraft energy supply system outlined in note 8, Property, plant and equipment. In this case, the interest rate on the lease liability was 3.476% as at the reporting date.