Component considerations during a lease review require knowledge of the specific lease conditions, it is vital you familiarise yourself with these.
While there are many variations consider the following example in the case of Hard time or Life Limited parts:
It is important to understand how a reliability program can affect an aircraft’s maintenance plan. When we think about trend analysis and aircraft reliability; we actually cover a complex and vast array of metrics, data gathering, and decisions based on this.
Factors considered would include Engine/APU trend data, Aircraft defect rates, component defect & failure rates, Aircraft technical delay/diversion rates and many more different considerations.
The name is a bit of a give away in that you might guess it is when something was “Last Done” and when it is “Next Due”. Commonly abbreviated to LDND, it is especially important during a lease review.
Typically you may consider the following in a Last Done / Next Due review:
Components on the aircraft can be considered in two basic categories:
OCCM – On Condition / Condition Monitored Components
HT – Hard Time Components
There are many reasons why a component may be changed while the aircraft is leased, such as component failure, aircraft defect trouble shooting, or when the component reaches the end of its defined life.
