AircraftaircraftstepupsAvionicsIndustry NewsEditorialMaintenanceSubscriber Only Engine Storage 101:The 30-Day Rule Manufacturers suggest that engine inactivity in excess of 30 days might require the need for special preservation methods to fight corrosion. By estaff - Published: March 20, 2019 Updated: October 29, 2019 Print Email Facebook Twitter How long is too long? It depends on the climate and how the engine was cared for during its time of rest. And as you would suspect, corrosion is the enemy. Herewith are some tips worth considering when parking the engine for long periods. To continue reading this article you must be a paid subscriber Subscribe Subscribe to Aviation Consumer Magazine Aviation Consumer is the independent online source for impartial and uncompromising evaluations of aircraft, avionics, accessories, equipment and more. Already Subscribed?Click Here to Sign In | Forgot your password?