Aircraft Reliability – Component Removal

Reliability monitoring of aircraft is a vital topic for consideration both as part of aircraft management (CAMO) and also aircraft leasing as a repeating defect can be grounds for a financial arrangement if the defect repeats within a certain time frame.

When we mention component removals for reliability purposes, we are not concerned about planned routine component removals. For example, if we remove a component for a reason such as an overhaul or to perform a modification then this is a planned removal. It does not have a negative impact on the aircraft and or component as it has not actually failed in service.

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Mid-Lease Inspection –Checklist

During the asset Life-Cycle the lessor has a duty to carry out aircraft due diligence on a periodic basis at a frequency agreed in the Aircraft Lease Agreement, this due diligence is commonly referred to as the “Mid-Lease”or “Mid-Term” Inspections.

We have looked at the varying different areas in the past few weeks and you can explore these posts to learn more –in a summary of these, it is important to define the required scope of what data needs to be collected.

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Mid Lease Inspection – Landing Gear Documentation & Records

During the review of the mid-lease inspection, there is a focus on the landing gear. These are a high-cost part of the aircraft and the impact of an overhaul is both a large consideration regarding the time frame and cost.

The landing gear cannot be overhauled “on wing” which means it must be removed to overhaul each landing gear and often it must be sent off-site to a specialist facility. The facility will then replace and overhaul the gear as required, the time frame for this can be several weeks and often we do not wait for the landing gear to be returned. Another replacement gear is commonly installed in this case to reduce the time on the ground for an aircraft.

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Aircraft Lease Transitions –Most common repeat findings

During a transition of an aircraft the aircraft technical records that detail all the maintenance for the aircraft is reviewed along with the supporting documentation and the status of the aircraft/components.

So,this week we are looking for your views on what the most common aircraft technical records issues that are found at Redelivery on an end-of-lease review.

From our experience, we have observed the following areas to be common and repeat findings that can have significant time and cost implications. They are in most case findings that while possibly not able to rectify in advance you can be aware of them and plan the response in advance.

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Mid-Lease Inspection –Technical Records Audit

The configuration of the aircraft can change significantly depending on the operation. For example, you might have a full freighter or a full-passenger aircraft.

It means as part of the mid-lease inspection that we must collect some general documents that relate to specific configurations regarding the fleet we operate.

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