Airman Certification Standards
ACS IR.VII.A
Loss of Communications
Knowledge
Procedures to follow in the event of lost communication during various phases of flight, including techniques for reestablishing communications, when it is acceptable to deviate from an instrument flight rules (IFR) clearance, and when to begin an approach at the destination.
Risk Management
Possible reasons for loss of communication.
Deviation from procedures for lost communications.
Skill
Recognize a simulated loss of communication.
Simulate actions to re-establish communication.
Determine whether to continue to flight plan destination or deviate.
Determine appropriate time to begin an approach.
Use single-pilot resource management (SRM) or crew resource management (CRM), as appropriate.
Retrieved from ecfr.gov on July 17, 2026.