An aircraft lease is complex and the lease conditions regarding obligations and protections serve to guard the asset and maintain value for the lessor, while allowing the lessee to operate the aircraft in a realistic and non disturbed manner during the lease period.
The lease is always going to favour the lessor in order to ensure the asset value and allow that the lessor maintains rights to the aircraft regarding access and or rights to repossess under certain circumstances – this is important as local or regional decisions can affect lessors and their dealings with certain countries or authority registrations if there is a risk to their asset.