The Angolan prevailed in the #41 WRT ORECA-Gibson 07 alongside Louis Deletraz and Robert Kubica thanks to a four-second shorter final pitstop than erstwhile leader Tom Blomqvist's #22 United Autosports ORECA.
In a race disrupted by four safety cars, the #41 crew was hampered by the timing of the third when Jacques Villeneuve's Vanwall Hypercar clashed with the GTE Am Ferrari of Francesco Castellacci, as Kubica was forced to take on emergency fuel and then pit again immediately after the race returned to green flag conditions.
However Kubica managed to save a lap of fuel relative to United driver Oliver Jarvis prior to their penultimate stops, which helped to ensure a quicker splash-and-dash when Blomqvist led Deletraz in 12 minutes from the end.
In what Andrade reckoned was "a hard race to follow for everybody", he told Autosport that the various strategy permutations were not clear until the final throes of the race.
"I didn’t really think we could win the race up until 12 minutes from the end, really, when we saw the strategy," he said.
"At one point we thought that United would win the race, at one point we thought InterEuropol would win the race because they anticipated the pitstops.
Source: Autosport