IATA Aircraft Lease Guidance

Annex IX: Components Guidelines
Operators often participate in a larger component pool, which makes it extremely difficult, if not impossible, to
prove the total hours and cycles of a component as this is normally not traced. By doing so the operator is not
able to prove compliance with the 110% ruling in the lease.
Component summaries often do not represent a complete status of the aircraft, i.e. not all installed
components are listed. Operators should ensure that when an aircraft is taken into service, all components
are introduced into the maintenance tracking system. In case of new aircraft, this can be done by importing
the delivery lists from the manufacturer, which today are often provided in digital formats such as Excel. For
used aircraft the exercise is usually more difficult, as one has to work with lists from the previous operator,
the accuracy of which cannot be confirmed. As such, physical component verification may be necessary.
For the HT components summary file, the date of last maintenance action as indicated on the release
certificate should be listed, and not the installation date of the component.
Consideration should be given to negotiate a solution for operators’ components (excluding LLPs and TCC
components) that are missing their Airworthiness Release Certificates at point of delivery/redelivery.
4 th Edition 2017 119