In 0 BBY, technical readouts to the Empire's new Death Starbattlestation were brought to the Yavin base by PrincessLeia Organa, and GeneralJan Dodonna devised a plan of attack. The attack would involve the T-65s, and so the chief performed maintenance on at least one of them before the battle. The T-65's pilot, Luke Skywalker, intended to use the droidR2-D2 as his astromech for the upcoming battle, but the chief noted that the droid did not look to be in the best of shape. He asked Skywalker whether he wanted a replacement, but the pilot objected, claiming that he and R2-D2 had been "through a lot together."[1] Finishing his maintenance, the chief cleared Skywalker for liftoff.[6] Skywalker would later go on to destroy the Death Star.[1]
When the company he worked for was nationalized by the government, the chief refused to stand by and let the Empire continue to rule, and so began serving the major Rebellion movement.[2] He was prone, at least on one occasion, to judge a droid merely by its appearance, rather than its performance.[1]