The leasing of an aircraft is a complex topic and an even more complex and very comprehensive review of the aircraft itself and the associated records.
While all the review is important, some areas have more potential impact than others due to their ability to impact cost or timelines significantly. Consider an out-of-date life vest Vs an engine that has damage revealed on a borescope inspection; of course, it is easy to see how one can be addressed with a small cost and time impact, and the other can have a significant impact on both.
Aircraft that are leased are done so as an investment for a return; this is important to always consider during a lease review as we have noted in prior posts –an airworthy aircraft might not necessarily meet lease return conditions.
To illustrate this,we can consider an aircraft that is leased for 6 years to IALTA Airlines –at delivery the aircraft will be maintained under an AMP (Approved Maintenance Plan) as per the Continued Airworthiness Management Organisation (CAMO) requires it and the National Aviation Authority (NAA) also.
The airline CAMO will over time change the maintenance plan, they may change it on induction to the fleet –this is called a bridging check when we transition from one maintenance plan to another. Often some additional tasks are required as the intervals between when they are required have changed on them.
An aircraft maintenance plan has several different sources that are used in creating it. When the sources are combined, they reflect that specific aircraft and so the maintenance plan is now customised accordingly. The multiple sources will determine tasks and apply instructions on when to carry these tasks out.
The tasks are from a multitude of sources such as Certification Maintenance Requirements (CMR) which are essential tasks to keep the aircraft safe and airworthy through to documents nonmandatory service bulletins (SB) or information letters.