diff --git a/Data/Abbr/aviation.csv b/Data/Abbr/aviation.csv
index 166d44e5..7c9cf793 100644
--- a/Data/Abbr/aviation.csv
+++ b/Data/Abbr/aviation.csv
@@ -143,6 +143,7 @@ ATCALS,Air Traffic Control and Landing Systems
 ATIS,Automatic Terminal Information Service
 ATM,Air Traffic Manager
 ATO,Air Traffic Organization
+AURO,Autorotation of helicopters
 AWACS,Airborne Warning And Control System
 BC,Back Course
 BAF,Belgian Air Force