MAINTENANCE

Other than simple inspections there will be no routine maintenance of the engine itself. The major maintenance interval of the engine is based on the proven safe life of the critical engine components, the turbine and the compressor.

This is determined by the number of start-shutdown cycles (and not factors such as total engine running time or with any extended interval for operating at reduced EGT).

The initial TBO (Time Between Overhaul) will be set at 500 cycles, typically enough for 4-5 years use. M&D Flugzeugbau plan to progressively extend this TBO as in-service experience increases.

As the TBO approaches, the owner-operator will advise Jonker Sailplanes / M&D Flugzeugbau. A replacement engine will be supplied and the existing engine returned to M&D Flugzeugbau. The engines will be exchanged according to the Maintenance Manual procedure. The returned engine will be stripped and the turbine and compressor replaced, together with the main bearings.

Other items will be inspected and replaced on condition. This overhaul will ‘zero-life’ the engine, i.e. it can be considered as new.

The cost of the overhaul will be the cost of a new turbine, a new compressor and new main bearings, plus items replaced on condition, installation labour and shipping. This cost has yet to be determined but is expected to be no more than the equivalent for traditional internal combustion sustainers.

Routine maintenance of the sustainer installation such as lubrication and cleaning may be performed by the owner-operator. Minor services should be performed by a JS-approved Aircraft Maintenance Organisation at the times as specified in the JS1 Revelation Maintenance Manual.

 
   
 

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