Aircraft engine maintenance demand is rising, but capacity isn’t keeping pace.
As Aviation Week reported in January 2026, a combination of factors, including durability challenges in newer engine programs, continued operation of aging fleets, and increasing overhaul volumes, is putting pressure on maintenance, repair, and overhaul (MRO) facilities.
The result is more engines moving through inspection cycles with less time available per inspection.
This increasing pressure is not affecting all parts of the workflow equally. It is concentrated in inspection, where time, visibility, and coverage requirements must all be met before repair can proceed.
Where the Bottleneck Emerges
Inspection occurs between disassembly (if required) and repair, directly determining the next steps.
As volumes increase, it can become the limiting step, especially for:
- Turbine shafts, drums, and spools
- Combustion and hot section components
- Internal passages and restricted geometries
- Surface flaw detection using FPI and MPI
Image: an on-wing, partially-disassembled gas turbine engine.
These inspections require complete coverage, controlled viewing, and documented indications, even as time per inspection decreases.
Why Inspection Slows Down
Inspection bottlenecks tend to be less procedural, but more maneuverability, access, and visibility limitations:
- Complex internal geometries with inconsistent viewing angles
- Limited access to internal surfaces & components
- Difficulty distinguishing true indications
- Friction in capturing and documenting results
Image: a cross-section of a gas turbofan engine
At larger sizes and higher volumes, these inefficiencies compound and begin to constrain MRO throughput.
UV-Based Inspection: Still Essential, Now Under Pressure
Fluorescent penetrant inspection (FPI) and magnetic particle inspection (MPI) remain foundational methods for detecting surface-breaking defects. In these processes, a fluorescent dye is applied to the surface, where it collects in indications such as small cracks or pitting. After excess dye is removed, any remaining material trapped in these areas emits a bright green glow under ultraviolet light.
UV-based imaging enables inspectors to:
- Detect fine cracks and discontinuities
- Differentiate indications from background noise
- Maintain repeatability and consistency across inspection cycles
Image: The SeeUV® Shaft and Coupler Inspection System (SCIS) fluorescing UV penetrant dye inside the shaft.
The requirement is no longer just detection. It is a repeatable, documented detection performed efficiently.
Two Inspection Realities
Large Components: Coverage and Repeatability
For shafts and spools, the challenge is complete and verifiable coverage.
SeeUV® large component systems support this by combining:
- UV and white light illumination
- Camera-based visualization
- Controlled positioning for repeatable inspection paths
The objective is to ensure every required surface is inspected consistently and can be verified.
Internal Areas: Access and Visibility
For turbine sections and internal passages, the primary constraint is access. UV video borescopes from Yateks and iShot® Imaging extend inspection into confined areas by delivering:
- Direct UV illumination at the inspection surface
- Clear visualization within restricted geometries
- Durable and maneuverable scope tips
Yateks P+ Video Borescopes and iShot® Model E UV Video Borescopes, both with UV LEDs.
The Converging Requirement
Across both inspection types, the requirement is consistent: increase inspection throughput without reducing inspection quality.
This includes reducing setup and repositioning time, improving the clarity of indication detection, standardizing inspection workflows, and supporting reliable documentation and traceability.
Inspection is no longer just a step in the process. It directly influences overall MRO throughput.
SeeUV® in Engine Inspection Workflows
Within aircraft engine MRO environments, SeeUV® systems are used to address complementary inspection needs.
Large Component Inspection
- Shafts, drums, and structural assemblies
- Controlled, repeatable coverage
Image: The SeeUV® WebViewer® Camera Inspection System extended in a spool cross-section with a 0-degree, or direct view, lens. The smaller image within is a drawing representation of a spool being inspected.
Internal Inspection
- Turbine and combustion sections
- UV borescopes for confined access
Together, these approaches address both coverage and access constraints across engine inspection workflows.
See It at MRO Americas 2026
InterTest will be exhibiting:
- SeeUV® Webviewer for turbine inspection workflows
- Yateks UV P+ Series Video Borescopes
- iShot® Model E UV Video Borescopes
InterTest at MRO Americas, Orlando, FL
April 21–23, 2026
Focused on enabling inspectors to see clearly, cover completely, and document reliably across aircraft engine inspection workflows.