Infrequent use on Turbomeca engine heads up

[as365n4]

According to: 71-05-01-951-012

1. 7 days as a maximum | no storage | Air inlet blanks and exhaust pipe installed, airframe cowls closed.
2. 6 months as a maximum | no storage | If engine can be operated: After 30 days, drain the original oil and replace it with new equivalent oil. Each week, operate the engine for at least 5 minutes to the ground idle.

everything else is classified as Short-term or Long-term storage.

So have a look in your specific Engine Manual for the correct procedure.