By Gp Capt (Dr) DK Pandey (Retd)
A British F-35 fighter plane, which executed an emergency landing in Thiruvananthapuram, Kerala, on June 14, 2025, remains stranded due to a suspected hydraulic malfunction. Meanwhile, the UK Navy has declined India’s offer of technical assistance, citing concerns about the jet’s sensitive technology.
The F-35B, a fifth-generation stealth aircraft valued at over $100 million, is stationed at Thiruvananthapuram International Airport. A UK team is anticipated to arrive to rectify technical issues, as the jet’s advanced attributes, including short take-off and vertical landing capabilities, are deemed highly confidential.
Hydraulic malfunction in F-35
The hydraulic malfunction in the British F-35B Lightning II poses several potential implications, rectification needs, and challenges in restoring the aircraft to operational status.
A hydraulic malfunction in the F-35 may impact flight control, landing gear functionality, armament systems, environmental controls, and engine operations, with particularly grave consequences for the F-35B’s STOVL capabilities.
Consequences of hydraulic malfunction
The hydraulic malfunction has stranded the aircraft for about a week, hindering its mission and operational preparedness. This interruption impacts the operations of the UK’s carrier strike group in the Indo-Pacific region.
The F-35B is a fifth-generation stealth aircraft equipped with advanced technology. The hydraulic failure and the aircraft’s location in a foreign nation heighten apprehensions regarding the security of its proprietary systems, possibly prompting the UK to reject India’s offer of assistance.
The F-35B has an estimated value exceeding $100 million. Extended downtime and associated maintenance expenses, including the potential need for military transport to repatriate the aircraft, may be considerable.
Requirements for rectification
Addressing the hydraulic failure necessitates specialised skills and equipment, prompting the anticipated arrival of a team from the UK. The team would likely comprise 30-35 personnel equipped with the requisite tools and components for maintenance and repair.
The hydraulic failure pertains to vital systems necessary for the aircraft’s functionality. Historical data indicate that such failures may incur damages of less than $50,000; however, the intricacy of the F-35’s systems could increase this expense. The repair involves verifying the integrity of the hydraulic lines, which are essential for directional control during landing and take-off.
Post-repair, the aircraft must undergo rigorous testing to verify the functionality of all systems and ensure compliance with safety regulations. This includes the examination of hydraulic systems, stealth functionalities, and more sophisticated attributes, such as short take-off and vertical landing.
Restoration procedure
The repair process may take several days due to the intricacy of the hydraulic systems and the necessity for comprehensive testing. Historical evidence suggests that such hydraulic failures have been rectified without considerable injury or damage; however, the F-35’s sophisticated technology may prolong this process. Should the hydraulic malfunction remain unresolved on-site, the aircraft may need to be transported back to the UK via a cargo aircraft. This might significantly extend the procedure, potentially by weeks, depending on logistics and transportation availability.
History of technical breakdowns in F-35
The incidence of malfunctions in the F-35 aircraft globally has raised concerns, especially regarding its reliability, maintainability, and availability (RMA) challenges.
Global mission proficiency rates: The F-35 fleet has consistently faced challenges in achieving its mission capability objectives. In fiscal year 2023, the US F-35 fleet was operational only 51 percent of the time, falling short of the Department of Defense’s 65 percent target. This pattern is not exclusive to the US but represents a worldwide issue, as other countries utilising the F-35, like the UK, encounter comparable difficulties.
A considerable fraction of the F-35’s downtime is ascribed to maintenance and repair complications. The Government Accountability Office (GAO) indicated that the F-35s are mission-ready approximately 55 percent of the time due to these issues. The fundamental issue frequently stems from an insufficient focus on sustainment requirements throughout the production phase, resulting in delays in aircraft repairs and a significant number of aircraft remaining inactive while awaiting components.
Prevalence and implications
Frequency of breakdowns: Although precise statistics on breakdown frequency are not publicly disclosed for security purposes, the overall impact is apparent in the mission capability rates. The F-35’s intricate systems, encompassing its sophisticated stealth technology and integrated avionics, render it susceptible to technical malfunctions necessitating specialised repairs.
Operating impact: These failures exert a cascading influence on military operations, diminishing the availability of aircraft for missions and escalating operating expenses due to the necessity for costly maintenance and repair activities.
Comparative context
Historical data: Previous variants of the F-35, including those undergoing developmental testing, have exhibited similar trends. As of September 2023, 628 F-35s had been delivered; however, many remained non-operational due to continued testing and enhancements, such as the Tech Refresh-3 update.
International perspective: Countries such as the UK, which utilise the F-35B type, encounter heightened obstacles due to the aircraft’s deployment in carrier-based missions, potentially intensifying maintenance complications in remote places.
Support extended by India to the F-35 team in Kerala
India has provided various types of support to the British F-35B team in Kerala following the aircraft’s emergency landing on June 14, 2025. The denial of support in this instance underscores the strategic importance of maintaining the integrity of modern systems.
The Indian Air Force (IAF) has rendered logistical support to ensure the aircraft’s secure landing and continued presence at Thiruvananthapuram International Airport. This entails collaboration with airport authorities and other relevant entities to ensure that the aircraft’s security and operational requirements are met.
The IAF was cognisant of the aircraft’s detour and enabled the emergency landing for safety considerations. This entailed securing the airspace and confirming the runway’s availability for the F-35B’s landing.
Provision of technical support: India extended technical support to address the hydraulic breakdown that immobilised the aircraft. The UK Navy refused the option of Indian engineers and technicians giving support due to the sensitive nature of F-35 technology.
The IAF proposed the construction of a temporary structure for the aircraft and provided access to a nearby hangar to safeguard it from environmental exposure and potential security threats. The UK team likewise rejected these offers. But Long grounded British F-35 fighter jet became meme material in Kerala.
Context and challenges
The UK Navy denied help from India due to concerns about the sensitive technology of the F-35B. This decision highlights the overarching challenge of maintaining secrecy and security for fifth-generation aircraft in foreign jurisdictions.
The six-day grounding of the F-35B has underscored logistical and operational problems, as the aircraft remained stationed in an open location pending the arrival of the UK team.
This incident transpires amidst India’s expanding military and diplomatic relations with the UK, highlighted by recent joint military exercises and enhanced bilateral ties; however, the denial of assistance emphasises the intricacies of international military collaboration and the safeguarding of proprietary technology.
After assessment of the technical health of the aircraft, it has been observed that necessary repair is not possible with available team in India. A 40-member contingent from the UK, comprising specialists with necessary resources, is anticipated to arrive in Thiruvananthapuram shortly to perform repairs. Despite this, numerous attempts to repair the aircraft and make it airworthy have been unsuccessful. As a result, partial dismantling has emerged as the most likely approach to enable the fighter to be returned via military aircraft.
Conclusion
The F-35B’s hydraulic failure has substantial operational, logistical, and security implications. The process of rectification necessitates the involvement of a specialised team from the United Kingdom, which is expected to involve extensive testing and intricate repairs. The incident emphasises the significance of resilient international military cooperation and the challenges of maintaining advanced military aircraft in distant operational theatres.
India has provided the F-35 team in Kerala with comprehensive assistance, including logistical support, emergency landing facilitation, technical assistance offers, and proposals for temporary shelter and hangar access. Nevertheless, the UK Navy’s decision to reject these proposals serves as a reminder of the complexities associated with safeguarding proprietary technology and international military cooperation.
