The turbine is an incredibly useful bit of mechanical technology designed to convert energy into work - in other words, to generate power in a usable form. Turbines are used in jet engines, hydroelectric power, and steam engines - just to name a few of the more common applications of turbines. A precisely engineered piece of technology, even older models can benefit from proper turbine storage.
Turbine storage is beneficial for a number of reasons. First, as a complex piece of technology, a given turbine is likely to have been manufactured specifically to work in a particular industry and even in a particular facility within an industry. Production lines for a particular turbine may be closed down, or it may be extremely difficult to get a replacement turbine in case an accident or defect damages an existing turbine. Storage of replacement turbines can help transform a major service disruption into a relatively manageable headache.
In terms of jet engine storage specifically, turbine storage is a vital component of long term readiness for military reserve forces. Combat aircraft go through turbine powered jet engines at an alarming rate, especially in hostile environmental conditions such as the desert. Keeping turbines stored along with entire jet engines allows a military force to keep reliable replacement engines and parts for those jet engines stored in a manner that they can be accessed and used in a crisis. Excellent examples of air forces who have likely made use of turbine storage as a part of jet engine storage in order to maintain unit readiness in case of crisis are that of the Israeli and Swedish air forces. Israel keeps a large quantity of spare parts on hand to maximize the number of sorties its aircraft can fly, and Sweden historically provided for its aircraft to be dispersed all across the country in a war, flying from strips of roadway near to mobile or fixed storage and maintenance facilities that would likely avoid detection in a war. Turbine storage, ammunition storage, and jet engine storage are essential to this dispersion strategy.
Disaster contingency plans can also benefit from turbine storage. Turbines involved in power generation are often highly specialized, and somewhat delicate. If damaged in a disaster, the time taken to replace a damaged turbine can have a significantly deleterious effect on restoring electric power to a given area in a timely manner.