How could the Soviets keep Graf Zeppelin's machinery running?

How could the Soviet Navy operate Graf Zeppelin's temperamental German high-pressure machinery and obtain spares?

The scenario uses coerced former German marine engineers and an East German spares plant until a major rebuild replaces the machinery.

American experience with captured German high-pressure machinery frames the question, since spares and exacting maintenance made such plants difficult to operate. Fleet of Oceans gives the alternate Soviet program two temporary solutions: former German marine engineers are compelled to serve, and an East German plant produces replacement parts. Their presence creates security and training problems aboard the carrier while Soviet crews learn the machinery. The hydraulic catapult system is removed during the first completion, and the propulsion plant lasts only until the major rebuild. Captured machinery yields experience at the cost of a coerced workforce and a dedicated supply chain.