Develop a competency specification for an aviation-related topic and produce a set of test items to asses

The full task is attached below.
Develop a competency specification for an aviation-related topic and produce a set of test items to assess it. Justify the items you have chosen in terms of item validity and reliability. Please read all the steps below BEFORE you select your topic; marks are awarded for completing each step.
Select from the following topics (you will then need to identify an individual task within your chosen topic):
• Aviation security identification of dangerous items
• Cabin crew handling of emergencies
• Passenger check-in systems
• Incident investigation
• Fault diagnosis
Bear in mind that you will need to find some test candidates to sit your exam – so don’t choose a topic that is too complex.