Reporting tips from reporters who have covered aviation issues:
Congressional Research Service reports on the FAA are helpful. Google “CRS” and “FAA reauthorization” to find the latest reports.
Follow all the players and stakeholders on Twitter.
Be persistent when seeking comment from the FAA.
Take advantage of very knowledgeable committee and member staffers, who may take time to background you if they know you’re not just looking for a quote.
The Bureau of Transportation Statistics is one of many government and private stakeholder sites with useful stats.