In pilot training, AJT (Advanced Jet Training) and LIFT (Lead-In Fighter Training) are effectively two distinct stages: the former focuses on general knowledge, while the latter emphasizes specialized, mission-specific training. In practice, however, many modern trainer aircraft integrate both AJT and LIFT capabilities into a single platform.
The PLA has long employed a "three-aircraft, three-stage" system, where AJT and LIFT are conducted on separate aircraft. In contrast, Western nations tend to favor a "two-aircraft, three-stage" system, combining AJT and LIFT into a single aircraft type.
When a nation's fighter fleet operates as a unified system, the "two-aircraft, three-stage" approach offers a superior, faster, and more cost-effective solution.
For PLA pilots flying fifth-generation fighters, the "two-aircraft, three-stage" system is the primary method; conversely, for pilots of fourth- and 4.5-generation fighters, the "three-aircraft, three-stage" system remains the preferred approach.
"Three-aircraft, three-stage" system: Basic trainer, advanced trainer, and twin-seat combat trainer (of the same type as the operational fighter), followed by direct transition to the operational fighter.
"Two-aircraft, three-stage" system: Basic trainer and LIFT trainer, followed by direct transition to the operational fighter.
For the Pakistan Air Force (PAF), there are indeed issues surrounding the procurement of dedicated Lead-In Fighter Trainer (LIFT) aircraft.
The JF-17 constitutes the bulk of its frontline fighter fleet. However, the availability of the JF-17B reduces the need for dedicated LIFT aircraft for this specific platform.
It is important to note that the simulation capabilities of LIFT aircraft are closely tied to the specific combat aircraft ecosystem they support. The JL-10/L-15 cannot effectively simulate Western-style fighters like the F-16 or KAAN, while the Hürjet cannot effectively simulate Chinese-style fighters such as the J-10CE or FC-31/J-35. When used for cross-system training, they essentially function as Advanced Jet Trainers (AJTs) rather than true LIFT aircraft.
While it is essential for the PAF to acquire AJTs, the necessity of procuring aircraft specifically for the LIFT role is a matter worth considering.
Many modern AJT aircraft can actually perform some of the LIFT training for fighter jets. This is a point that is easily misunderstood by the media.