NAVAIR V-22 Review: “Cumulative Risk” Warning and 32 Mandatory Fixes

Naval Air Systems Command (NAVAIR) released the findings of its comprehensive review of the V-22 Osprey program on December 12, 2025. While the report reaffirmed the platform’s airworthiness under current strict operational controls, it delivered a stark assessment of the fleet’s safety culture, identifying a “cumulative risk posture” that has grown unchecked since the Military-Aircraft was first fielded.

The review, which covers variants flown by the Air Force (CV-22), Marine Corps (MV-22), and Navy (CMV-22), was triggered by a series of mishaps, including the catastrophic November 2023 crash of an Air-Forces CV-22B off the coast of Japan that resulted in the deaths of eight airmen. According to the findings, the program must implement 32 distinct recommendations to address systemic failures in safety, maintenance, and supply chain management.

Systemic Issues and “Cumulative Risk”

The core finding of the NAVAIR report is that safety risks within the V-22 program have been allowed to accumulate rather than diminish over time. In mature aircraft programs, risk profiles typically decrease as the platform ages and operators gain experience. However, the review concludes that the V-22’s risk profile has increased.

Data released in the report highlights a significant disparity in how quickly the V-22 program addresses critical issues compared to other naval aviation platforms:

• Resolution Time: Critical safety and technical issues on the V-22 have gone unresolved for an average of 10 years.
• Comparison: The average time to resolve similar risks in other naval aviation platforms is approximately six years.
• Risk Ranking: The V-22 currently holds the second-highest number of “catastrophic” risk factors across all Naval Aviation platforms.

The review suggests that these delays were exacerbated by “siloed operations,” criticizing the lack of coordination between the Navy, Marine Corps, and Air Force. Differing safety standards and maintenance procedures among the services contributed to a fragmented approach to fleet safety.

Material Failure Confirmed

The report definitively confirmed the cause of the November 2023 crash. Investigators identified a material failure in the proprotor gearbox (PRGB). Specifically, “inclusions”, impurities in the steel alloy gears, led to cracking and eventual failure of the component. This finding validates earlier concerns regarding the quality control of critical drive system components.

Technical Overhaul and “Triple-Melt” Steel

To address the material failures identified in the gearbox, the program is undertaking a significant Manufacturing shift. According to the review, the program is transitioning to a “triple-melt” (VIM-VAR-VAR) forging process for critical gear components.

This advanced manufacturing technique is designed to remove impurities from the alloy. NAVAIR estimates that this process will reduce the risk of inclusions by approximately 85% to 90%. The timeline for these technical upgrades is as follows:

• Summer 2025: Depot-level installation of the new “triple-melt” gears is scheduled to begin.
• 2026: Unrestricted flight operations are expected to resume, pending fleet-wide installation.

In addition to the gearbox metallurgy, the program is deploying a redesigned input quill assembly to mitigate “hard clutch engagements,” a historic mechanical issue for the Osprey. The fleet will also see the deployment of the Osprey Drive System Safety and Health Instrumentation (ODSSHI), a network of advanced sensors capable of monitoring vibration and gear health in real-time to alert crews of potential failures.

Operational Status and Restrictions

Despite the technical roadmap, the V-22 fleet remains under significant operational restrictions as of December 12, 2025. While the aircraft is deemed airworthy, the review mandates that flights generally remain within 30 minutes of a suitable divert airfield. This restriction ensures that pilots can land quickly if a mechanical issue arises.

Furthermore, the program has established a strict flight-hour threshold for proprotor gearboxes. Any aircraft exceeding this threshold must undergo rigorous inspections or component replacement before returning to flight.

“When the V-22 Enterprise does not actively manage risks… the risks compound, increasing the likelihood of a catastrophic event.”

— Vice Adm. John E. Dougherty, NAVAIR Commander

Organizational Changes

Beyond technical fixes, the review calls for a restructuring of how the V-22 program is managed. A key recommendation is the establishment of a joint “Readiness and Safety Steering Board.” This body will be responsible for enforcing uniform Standards across the Air Force, Navy, and Marine Corps, reporting annually to top leadership to ensure accountability.

The report also outlines a shift toward a “proactive safety system.” This new approach aims to identify and fix mechanical issues before they lead to mishaps, moving the program away from the reactive posture that characterized the last decade.

AirPro News Analysis

The NAVAIR review represents a pivotal moment for the V-22 Osprey, a platform that has long been defined by its revolutionary tiltrotor capability and its troubled safety record. The admission of a “cumulative risk posture” is significant; it suggests that the bureaucracy surrounding the aircraft became desensitized to warning signs over the last decade.

While the technical solution, “triple-melt” steel, appears robust, the timeline suggests that the V-22 fleet will remain operationally hamstrung for at least another year. The challenge for NAVAIR will not just be manufacturing new gears, but enforcing the cultural changes required to break down the silos between the three services. If the new Safety Steering Board cannot enforce uniform standards, the technical upgrades may only solve part of the equation.

Frequently Asked Questions

Is the V-22 Osprey currently flying?

Yes, but with restrictions. As of December 2025, the aircraft is restricted to flying within 30 minutes of a suitable divert airfield.

What caused the November 2023 crash?

The review confirmed the crash was caused by a material failure in the proprotor gearbox due to impurities (inclusions) in the steel alloy gears.

When will the fleet return to full operations?

Unrestricted flight operations are not expected to resume until 2026, following the installation of upgraded gearbox components.

Sources

• NAVAIR / US Air Force