LEGO 42020 Twin-rotor Helicopter Set Parts Inventory and Instructions - LEGO Reference Guide
2014 LEGO 42020 145 Pieces TECHNIC (1A)
![BrickLink - Set 42020-1 : LEGO Twin-rotor Helicopter [Technic:Model:Airport] - BrickLink Reference Catalog](https://img.bricklink.com/ItemImage/IN/0/42020-1.png "BrickLink - Set 42020-1 : LEGO Twin-rotor Helicopter [Technic:Model:Airport] - BrickLink Reference Catalog")
BrickLink - Set 42020-1 : LEGO Twin-rotor Helicopter [Technic:Model:Airport] - BrickLink Reference Catalog
LEGO 42020 Twin-rotor Helicopter Instructions, Technic
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LEGO Technic Bird - My 42020 Alternate - YouTube
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