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Process and clarify the statement that the NTSB is an independent agency. LO 1 MODULE REF: 2 The NTSB is an independent agency of the US government that determines the probable causes of transportation accidents and incidents (defined under Part 830) as well as promoting safety through non-binding recommendations, safety studies etc. The NTSB is also the library data base for accident and incident information. Due to its small size the NTSB will use the ‘Party Process” on certain investigations ( e.g Part 121 air carrier). Here, selected and invited specialists of various disciplines will assist in the investigation but the NTSB retains FULL authority and control of the investigation. POOL 2 1.Explain, define the HFACS model. How is this model applied in the management of human error?2.Explain, define and contrast the SHELL and 5M human factor models and their application in aviation safety.