Why not? What is so special about airports? Go ahead and do some literature survey on TQM in general to start with, then narrow it down to services, and then further into services where the customer base is very large and varying; and then finally home in on airport services. However, a note of caution: as it is a Masters dissertation rather than a doctoral thesis, it is better to narrow the field down and pick a particular aspect of airport operation. Otherwise you may be taking on too wide a project for comfort.
Have a lovely day.
Learning and Teaching Fellow (Retd.)
The University of Bolton, UK.
Brief profile in "About us" at 3rd August 2011 From United Kingdom