AMS5554H is the result of a Five-Year Review and update of the specification. The revision updates the Title and document to better identify heat treatment, updates composition testing and reporting (3.1, 3.1.1), clarifies heat treatment, adds passivation and standardizes processing requirements with similar tubing (3.2, 3.3), provides heat treatment in a table format (3.5.2), updates tensile testing and adds note on small diameter limitations (3.5.2.1), updates white cloth test (3.6.1), adds NDT (3.6.2), clarifies type of tubing (3.7, 5.2), prohibits unauthorized exceptions (3.8, 4.4.1, 5.2.1, 8.5), adds country of origin and NDT acceptance and reporting requirements (4.2.1, 4.4, 8.6), provides definitions (8.2), and allows prior revisions (8.4).