Continuous Lower Energy, Emissions and Noise (CLEEN) Phase IV Program: Q&A Responses and FINAL SIR Release

Tuesday, April 28, 2026

The FAA Acquisition Office has posted the FAA's responses to the questions, concerns, and requests submitted regarding the Final SIR on April 13, 2026. 

Tuesday, March 31, 2026

The FAA Acquisition Office has posted an update to the responses to the questions received following the initial Draft SIR. These responses are available for review by all interested parties. 

All other information posted by the FAA Acquisition Office on Monday, March 30, 2026 regarding the Continuous Lower Energy, Emissions and Noise (CLEEN) Phase IV Program: Q&A Responses and FINAL SIR Release remains the same. 

Monday, March 30, 2026

The FAA Acquisition Office has posted responses to questions received following the initial Draft SIR. These responses are available for review by all interested parties.

This announcement serves to inform industry participants of the contract opportunity and to invite offerors to submit proposals for the Final SIR.

• All questions, concerns, and requests for clarification regarding the Final SIR must be submitted in writing by 12:00 PM EDT on April 13, 2026.
   
• The deadline for proposal submission is 12:00 PM EDT on May 18, 2026.

Please ensure you review the Final SIR in its entirety for complete details and requirements.