1994 Serb J-21 Jastreb shootdown

On 28 February 1994, two pairs of North Atlantic Treaty Organisation (NATO) General Dynamics F-16C Fighting Falcon aircraft shot down five J-21 Jastreb single-seat light attack jets–piloted by Republika Srpska (RS) or Republic of Serbian Krajina (RSK) personnel–in Bosnia and Herzegovina airspace after they had bombed an armaments factory at Novi Travnik during the Bosnian War. The interception was part of NATO's Operation Deny Flight, with the shootdown constituting the first combat action in the alliance's history.

About 06:00, six J-21s flew from Udbina air base in the self-proclaimed Croatian Serb proto-state within Croatia known as the RSK. Two Soko J-22 Orao ground attack aircraft were also involved in the attack, but their target was an arms factory at Bugojno and they completed their mission and returned to Udbina unscathed. The pilots were a mix of RS and RSK air force personnel. A British airborne warning and control system (AWACS) aircraft detected the aircraft and, after their warning was ignored, tasked a pair of United States Air Force (USAF) F-16C Fighting Falcons on combat air patrol (CAP) to intercept. The fighters issued a further warning, and when it was ignored and the J-21s dropped their bombs, the F-16Cs engaged the aircraft as they fled for the Croatian border. One US pilot claimed three aircraft shot down, and when the first pair of F-16Cs departed to refuel, a second pair of F-16Cs engaged, shooting down another J-21. According to RS/RSK records, a fifth J-21 was also lost. Three pilots were killed and two ejected safely. The single surviving J-21 was badly damaged and conducted an emergency landing at Udbina. The three surviving pilots were later decorated.

The shootdown showed the effectiveness of the NATO response, and was the sole example of fixed-wing aircraft being shot down by NATO during Operation Deny Flight. No more direct challenges by fixed-wing aircraft were made during the operation, but the RS and RSK conducted a few short raids into Bosnia from Udbina during the balance of 1994 before the airbase was struck by NATO in late November. In June of the following year, one of the US pilots involved in the shootdown was himself shot down by a Serb RS surface-to-air missile over Mrkonjić Grad. He ejected and was rescued by US forces.

Background

Operation Deny Flight was a NATO operation in the airspace over Bosnia and Herzegovina. It conducted aerial monitoring and enforced compliance with a "no-fly zone" and provided close air support to United Nations (UN) peacekeeping forces mandated by the United Nations Security Council. It also conducted, after request by and in coordination with the UN, approved air strikes against designated targets threatening the security of the UN-declared safe areas. It commenced on 12 April 1993, and was implemented by NATO Allied Forces Southern Europe (AFSOUTH) headquartered in Naples, Italy. Control of the operation was delegated to the Commander of Allied Air Forces Southern Europe (COMAIRSOUTH), and operational control of day-to-day mission tasking was delegated to the Commander, 5th Allied Tactical Air Force (5th ATAF), headquartered at Vicenza, Italy.

The no-fly zone did not extend to the territory of neighbouring Croatia, where a significant part of the country–mainly along the western border of Bosnia and Herzegovina–was controlled by the self-proclaimed Croatian Serb proto-state known as the Republic of Serbian Krajina (RSK). The RSK had a small air force operating from the former Yugoslav Air Force base at Udbina. In autumn 1993, the rump Federal Republic of Yugoslavia (FRY) donated a batch of J-21 Jastreb single-seat light attack jets to the RSK air force, transporting the disassembled aircraft by road from Serbia and assembling them at Udbina. These aircraft were used to form the 249th Fighter-Bomber Aviation Squadron. There was close cooperation between the RSK air force and the air force of the self-proclaimed proto-state within Bosnia and Herzegovina known as Republika Srpska (RS). Calls to further reinforce the RSK air force led to another 14 J-21s being donated to the RSK air force by the FRY before the end of 1993. The RS air force had earlier transferred some of its other air assets, including some Soko J-22 Orao ground attack aircraft, to Udbina. The close cooperation between the two air forces included the training of RS air force pilots at Udbina, allowing them to maintain their flight proficiency in Croatian airspace. None of the Jastrebs had working radar warning receivers.

On 5 February 1994, the 526th Fighter Squadron of the 86th Fighter Wing of the USAF was transferred from Ramstein Air Base in Germany to Aviano Air Base in Italy to take part in Operation Deny Flight. The squadron was equipped with General Dynamics F-16C Fighting Falcons.