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Have you read of Akatsuki, JAXA's Venus orbiter? It suffered a grievous propulsion failure in 2010 when a pressurant valve failed, causing its large main engine to run oxidizer-rich -- its nozzle thus shattered and fell off. It was therefore unable to enter Venus orbit in 2010.

However, JAXA engineers saved the spacecraft and salvaged the mission: after five years of orbiting the sun (beyond its expected lifetime), Akatsuki's far smaller attitude-control thrusters were lit up (for 20 minutes straight!), causing it to successfully enter Venusian orbit in 2015, and it's been functioning ever since.

This is really cool! Thanks for sharing!

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