If the airlines is not doing well then it could be because of non-measurement of the organisational performance. Therefore, your first job would be to start measuring the organisation's performance, further break it down to various departments and assign those measures to the various HODs. Any HR intervention must be aimed at reduction in operational cost.
In addition to defining the measures of performance, you may define various standards of recruitment as well. Customer satisfaction starts with the right recruitment. Wrong people never give desired level of performance nor do they satisfy the customers.
Going further, you may define the role of the managers. Managers play vital role in motivating the employees. Many things depend on the motivated state of the employees. You may work on that also.
For further assistance if any, feel free to contact me.