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Engine Combustion
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Engineering Change Order
in NASA
Earth Communications Office
in NASA
Earth Crossing Objects
in NASA
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Similar to ECO
AA - Adverse Action
AA - Antenna Assembly
AAA - Avionics Air Assembly
AAC - Aft Access Closure
AACB - Aeronautics and Astronautics Coordinating Board
AAD - Attitude Anomaly Detector
AAFE - AeroAssist Flight Experiment
View all in NASA