The Pakistan Air Force is conducting comprehensive modernisation talks with Turkish Aerospace Industries for its ageing F-16 fleet. Details on UBAS and SLEP are covered in the article.
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STRUCTURAL CRISIS AND TAI’S SLEP PROPOSAL
Sources close to the talks confirm that a senior PAF delegation visited TUSAŞ facilities in Kazan, Ankara, in October 2025. The main objective of the visit was to develop a Service Life Extension Program (SLEP) for the PAF’s oldest F-16s.
At the centre of the issue are the Block-15 F-16A/B aircraft delivered between 1983 and 1987. Estimated to number between 55 and 60, these jets have reached around 40 years of service life and accumulated approximately 7,500–8,000 flight hours. Given their current structural condition, their retirement by 2030 is considered inevitable without significant intervention.
TUSAŞ has proposed a structural refurbishment package similar to the indigenous “Özgür” modernisation project, which extended the service life of the Turkish Air Force’s F-16 Block-30 fleet from 8,000 to 12,000 hours. Under the programme planned for Pakistan, the renewal of critical load-bearing components is envisaged, including:
- Wing carry-through structures
- Longitudinal spars
- Landing gear attachment points
To save time and ensure technology transfer, the modernisation is planned to be carried out at Pakistan’s F-16 maintenance facility in Kamra, using Turkish-made structural kits.
A SOLUTION THAT BYPASSES US RESTRICTIONS: UBAS
One of the most critical elements of the proposed agreement is the integration of the Universal Battlefield Armament System (UBAS).
Developed by TUSAŞ in cooperation with ASELSAN, UBAS offers an alternative to the restrictive source-code controls applied by Lockheed Martin on F-16s. The system is described as a “tablet-based” fire control interface that operates independently of the aircraft and bypasses the main mission computers.
Communicating directly with weapon stations via an open-architecture data bus, UBAS enables the integration of non-US munitions without US approval. This would allow Pakistan to equip its F-16 fleet with Turkish-made modern weapons.
Prominent munitions include:
- GÖKDOĞAN: An active radar-guided BVR air-to-air missile with a range exceeding 100 km (AIM-120 AMRAAM equivalent)
- BOZDOĞAN: A short-range missile with an imaging infrared seeker and high off-boresight capability (AIM-9X equivalent)
- Precision-guided bombs: JDAM-like HGK kits and laser/GPS-guided TEBER kits
Open-source reports indicate that Turkey has successfully tested these munitions both on its own F-16s and on the Kızılelma unmanned combat aircraft, with the systems having reached operational maturity.
2029 TARGET: 45 MODERNISED F-16s
If the Turkish–Pakistani cooperation, which officials say is “95 per cent complete,” is implemented, Pakistan aims to return approximately 45 modernised F-16s to active service by 2029.
This solution is viewed as a temporary but critical bridge to maintain fleet strength until Pakistan’s AZM fifth-generation fighter programme matures in the mid-2030s.
PS: One Greek website says MURAD GaN radar by Aselsan could also be part of the upgrade.