Federal Aviation Administration’s (FAA) AST Environmental Support Services 1. Questions received in response to SIR Section L.8 SIR QUESTIONS, CONCERNS, AND CLARIFICATIONS, have been posted. 2. The Fi... Federal Aviation Administration’s (FAA) AST Environmental Support Services 1. Questions received in response to SIR Section L.8 SIR QUESTIONS, CONCERNS, AND CLARIFICATIONS, have been posted. 2. The Final SIR posted in SAM.gov on January 15, 2026, under Notice I.D. 693KA9-26-R-00009 is amended. 3. The deadline for proposal submission is unchanged and still is March 18, 2026 2PM EST