David Durham, Director of Global Engine Sales for JSSI Parts & Engines, recently spoke with AvBuyer on how to best prepare for engine core zone inspections (CZIs). We’ve summarized his commentary below, with a link to read the full article at the bottom of this post.
–
Introduction
CZIs are among the most significant maintenance events an aircraft owner or operator will face, yet they’re often misunderstood until the engine is already disassembled. While a CZI is commonly viewed as a scheduled inspection milestone, its outcome is largely shaped by preparation that is undertaken well in advance of the process beginning.
When aircraft owners and operators approach a CZI, preparation is often the determining factor between a predictable maintenance event and an unexpectedly expensive, drawn‑out one. As Durham explains, understanding the true scope of a CZI – along with planning well ahead – can dramatically reduce cost exposure and downtime.
What a CZI Really Involves
According to Durham, the scope of a CZI varies by engine make and model, but operators should always expect a complete engine dismantle with thorough inspection of all components. One surprise that catches many first‑time operators off guard is the possibility that life‑limited components (LLCs) may fail inspection even when they still show remaining service life. When that happens, the cost of the event can rise sharply.
To better manage that risk, Durham recommends enrolling in an hourly cost maintenance program, which spreads costs over time and shifts the financial burden of unexpected findings to the program provider. Learn more about JSSI’s Maintenance Programs.
The Importance of Document Readiness
Induction delays are common when documentation is incomplete. Durham emphasizes that providing full logbooks and previous shop visit reports is essential to keeping the process efficient and avoiding unnecessary complications.
He also stresses the value of using a centralized maintenance tracking system, such as Traxxall, which consolidates critical records and helps streamline the induction process – something that translates directly into faster turnaround.
Avoiding the Most Common Planning Mistakes
At JSSI, the technical services team collaborates closely with the Parts & Engines division to plan material and rental engine requirements 6 to 24 months in advance for client events. This proactive model helps ensure availability of key components and reduces downtime risks.
To further support operators, JSSI also maintains a lease pool of 85+ engines and APUs, giving clients an additional buffer when engines are down for long, complex shop visits. View JSSI’s rental portfolio.
–
