Engine Maintenance Backlog and Service Margins: The Diverging Path for GE and RTX
Aircraft engine downtime continues to rise. The confluence of parts supply delays and insufficient maintenance capacity creates a structural bottleneck. This structural constraint is squeezing the service revenues of GE and RTX in different ways.
The Aircraft Aftermarket: Revenue Beyond Manufacturing
The real money in aircraft engines comes not from selling them but from servicing them. Engine sales are one-time events, while maintenance, parts, and technical services span decades. The industry calls this the “aftermarket” or “service” segment. Both GE and RTX have high margin rates in this division.
As of November 4, 2026, GE’s closing price was $329.45. This year’s revenue growth rate is 15.9%, with the aerospace services segment showing strong performance. RTX’s closing price on the same date was $198.43, and its revenue growth rate is 11.1%. GE is growing faster.
Four Structural Pressures Lengthening Maintenance Wait Times
1. Insufficient parallelization in the parts supply chain: Aircraft engine parts rely heavily on specialized suppliers in specific regions (United States, Germany, Japan). After the pandemic, some suppliers reduced production scale, and backlogs expanded to 6–12 months. In a single-supplier system, one bottleneck delays the entire maintenance schedule.
2. Maintenance curves for new aircraft introductions: The rise of new aircraft types such as the Boeing 787 and Airbus A380 has diversified maintenance standards. The maintenance processes of different engines (GE9X, Rolls-Royce Trent XWB) are incompatible, requiring new training and investment. Airlines struggle to predict maintenance costs with confidence.
3. A vicious cycle of skilled technician shortages: During the pandemic, aviation industry downsizing caused a mass exodus of maintenance personnel. Since then, airlines normalizing operations suddenly demand more maintenance work, but training technicians takes 2–3 years. The cost burden is large, and smaller maintenance shops are postponing workforce investment.
4. The paradox of engine life management: As engines age, maintenance intervals shorten. Even with the same number of engines, maintenance schedules scatter, making it difficult for shops to optimize their schedules. Predictable bulk maintenance gives way to small emergency repairs, reducing efficiency.
Service Revenue Structure at GE and RTX: Strengths and Weaknesses
GE’s profit strength: GE’s net profit margin is 17.3%, and its P/E ratio is 36.3 (as of November 4, 2026). The high net margin means GE has strong pricing power in aerospace services. Parts supply delays may even become an opportunity to raise parts prices. GE is transitioning from time-based to condition-based services, which expands margins.
RTX’s defensive position: RTX’s net profit margin is 8.8%, and its P/E ratio is 31.7. The relatively low figures reflect a large defense contract share. Long-term contracts provide stability, but maintenance backlogs inevitably increase cost pressures. Its freedom to raise prices is more limited than GE’s.
Economies of scale: GE’s market cap is KRW 329.2 billion, and RTX is KRW 263.0 billion. GE’s larger investment capacity means it is likely to enter new technologies like 3D-printed parts and AI-driven predictive maintenance first.
Summary
Aircraft engine maintenance backlog is not just a supply chain issue but a structural transition. In an environment where both parts prices and maintenance wait times rise, GE can defend margins with its high net profit rate of 17.3%, while RTX avoids losses with its defensive contracts (8.8% net margin). Who navigates this span better depends on how quickly the supply chain normalizes in 2027.
This article is for information only and is not investment advice.