Beriev A-50
| Company type | Military aircraft |
|---|---|
| Industry | Aerospace |
| Founded | 1978 |
| Headquarters | Soviet Union |
| Products | Airborne early warning and control aircraft |
The Beriev A-50 (known by its NATO reporting name as Mainstay) is an airborne early warning and control (AEW&C) aircraft originating from the Soviet Union, built upon the Ilyushin Il-76 transport airframe. Conceived to succeed the Tupolev Tu-126 "Moss", the A-50 completed its maiden flight in 1978. Its existence was disclosed to Western intelligence through the efforts of Adolf Tolkachev. The aircraft officially entered operational service in 1985, with approximately 42 units produced by 1992, when manufacturing ceased due to the breakup of the Soviet Union.
A-50
The A-50 is operated by a crew of 15 personnel who manage the extensive Liana surveillance radar, which is mounted within a 9-meter diameter rotodome positioned atop the fuselage. This radar system can detect airborne targets at distances up to 650 kilometers and ground targets up to 300 kilometers away. The platform is capable of directing as many as ten fighter jets simultaneously during both air-to-air and air-to-ground operations. It boasts an endurance of four hours and an operational radius reaching 1,000 kilometers, with a maximum takeoff weight of 190 metric tons. In-flight refueling capabilities are provided by Il-78 tanker aircraft.
The "Vega-M" radar, developed by MNIIP Moscow and manufactured by NPO Vega, can simultaneously track up to 150 targets within a range of 230 kilometers, while also detecting large maritime vessels at distances extending to 400 kilometers.
A-50U
Upgrades commenced in 2003 with the introduction of the A-50U variant, which incorporates digital avionics supplied by NPO Vega that significantly improve data handling, signal tracking, and target identification. Enhancements also extend to crew comfort and operational facilities. Following state trials beginning in 2008, Beriev delivered the first A-50U ("47 Red," RF-92957) to the Russian Air Force in October 2011. This aircraft was assigned to the 2457th Aviation Base located at Ivanovo Severny, an installation operating a fleet of 16 such units.
By September 2023, eight A-50U aircraft had been delivered, including the fourth ("41 Taganrog," March 2017) and fifth ("45 Red," December 2018) examples. The modernization embodied in the A-50U serves as a foundation for the design of the Beriev A-100 AEW&C system, which will be equipped with a new Vega Premier active electronically scanned array radar.
Rostec has announced intentions to restart production of the A-50U in 2024; nonetheless, delays are anticipated before these new aircraft become operational.
Peacetime operations
The A-50 entered active service in 1984 with the 67th Independent Aviation Squadron for Long-Range Airborne Surveillance (67 OAE DRLO), based at Šiauliai in the Lithuanian SSR. This unit was later renamed as the 144th Independent Regiment DRLO and relocated to Pechora Kamenka ("Berezovka") in 1998.
Between 1985 and 1995, a detachment comprising two A-50s and one Il-76 operated under the 192nd Guards Kerch Red Banner Military Transport Aviation Regiment at Ukurey Airfield, Russia; following disbandment, these aircraft were transferred to the 144th Regiment. Additionally, from 1985 until 1993, the 18th Independent Aviation Detachment DRLO conducted operations from Vitebsk-Severny airfield.
During Operations Desert Shield and Desert Storm (1990–1991), two A-50s were deployed monitoring U.S. Air Force activities over the Black Sea region, specifically tracking potential cruise missile threats.
Syrian Civil War
Starting in December 2015, the A-50 commenced missions over Syria as part of Russia's military intervention efforts.
Russo-Ukrainian War
In December 2018, Russia stationed the A-50 airborne early warning aircraft in Crimea, enhancing its aerial surveillance and control capabilities on the peninsula.
On 26 February 2023, the Belarusian partisan organization BYPOL claimed responsibility for a drone strike that targeted a Russian A-50 at the Machulishchy airfield near Minsk, a base also housing MiG-31 fighters deployed against Ukraine. Subsequent satellite images revealed no major harm to the plane. BYPOL released footage demonstrating drones approaching the A-50’s rotodome.
The UK Ministry of Defence reported on 17 November 2023 that Russia was probably upgrading its A-50 fleet in anticipation of Western nations supplying Ukraine with advanced fighters such as the F-16. The report also suggested possible integration of these aircraft with ground-based S-400 missile defense systems.
Ukrainian forces asserted they had shot down an A-50 over the Sea of Azov near Kyrylivka on 14 January 2024. This claim was supported by Western and Ukrainian intelligence, including confirmation from a Russian Su-30 pilot who detected the crash. Analysts noted that gaps in Russian radar coverage over Crimea prompted relocation of A-50s closer to Ukrainian surface-to-air missile positions. The incident reportedly reduced Russia’s operational A-50 fleet to two units. Open-source investigators identified the downed aircraft as A-50U "37 red," belonging to the 610th Center for Combat Use and Retraining of Military Transport Aviation Flight Personnel. U.S. Army sources later verified that a Ukrainian-operated Patriot missile system was responsible for the shootdown.
On 23 February 2024, Ukraine announced it had destroyed a second A-50U over the Sea of Azov in Krasnodar Krai using an S-200 missile system, resulting in the deaths of ten Russian servicemen, including five majors. The aircraft was identified as A-50U "42 red" from the same unit. Kyrylo Budanov, head of Ukrainian Defense Intelligence, stated that following these losses, Russia retained only six operational A-50s; this was corroborated by BBC reports confirming an original fleet size of six with two lost in 2024.
The Taganrog Beriev Aviation Scientific and Technical Complex, responsible for maintenance and repairs of A-50 aircraft, reportedly sustained damage during a Ukrainian drone attack on March 8–9, 2024.
On 1 June 2025, Ukraine’s Security Service (SBU) claimed that drone strikes at Ivanovo airbase damaged two A-50s as part of Operation Spider's Web. Video evidence showed damage including missing engines and deteriorated radomes; however, their current operational condition remains uncertain.
Variants
- A-50 – Initial production model
- A-50M – Upgraded version featuring mid-air refueling capability and Shemel-2 radar systems
- A-50U (Mainstay-B) – Further modernized variant incorporating advanced electronic suites, improved crew accommodations, and Shemel-M radar
- Ilyushin/Beriyev 'Aircraft 676' – Modified IL-76 platforms adapted for telemetry collection serving as interim tracking aircraft
- Ilyushin/Beriyev 'Aircraft 776' – Similar telemetry and tracking aircraft based on IL-76 airframes
- Ilyushin/Beriyev 'Aircraft 976' (SKIP) – Airborne check-measure-and-control centers derived from IL-76MD used for cruise missile testing; operated under Aeroflot markings despite military function
- Izdeliye 1076 – Specialized IL-76 variant with undisclosed mission roles; only one prototype constructed
- A-50EI – Export configuration developed for the Indian Air Force, equipped with Aviadvigatel PS-90A-76 engines and Israeli EL/W-2090 radar system
Operators
India incorporated its initial A-50 into service on May 28, 2009, assigning it to No. 50 Squadron.
- Indian Air Force – Currently operates 3 units, with 2 additional aircraft ordered.
- Based at Agra Air Force Station, Agra, Uttar Pradesh
- Operated by No. 50 Squadron
- Based at Agra Air Force Station, Agra, Uttar Pradesh
North Korea's A-50 completed its maiden flight on March 26, 2025, but had not reached full operational status as of October 2025.
- Korean People's Army Air Force – 1 aircraft in active service
As of mid-2025, Russia maintains between three and nine A-50s in its fleet.
- Russian Aerospace Forces
- Stationed at the 2457th Aviation Base (Ivanovo Severny)
- Assigned to the 144th Independent Regiment Long-Range Airborne Surveillance
Former operators
Before halting production following the Soviet Union’s collapse, approximately 40 to 42 A-50s were manufactured.
- Soviet Air Defence Forces (1984–1992)
- Included the 144th Independent Regiment Long-Range Airborne Surveillance
After the dissolution of the USSR, Russia retained the majority of existing A-50 aircraft, although precise quantities remain uncertain.
- Russian Air Defence Forces (1992–1998)
Further reading