AK27I means 73% nitric acid + 27% N2O4 + Iodine passivant AK = Azotna Kislota = Nitric Acid in NASA

Similar to AK27I

ACCMS - Advanced Checkout, Control, and Maintenance System
ACCS - Advanced Checkout and Control System
ACE - Advanced Composition Explorer
ACE - Apollo Checkout Equipment
ACES - Acoustic Containerless Experiment System
ACF - Auto- Correlation Function
ACFS - Advanced Concepts Flight Simulator

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