PZL Mielec
Polish aerospace manufacturer in Mielec, now operating as a Lockheed Martin company.
Last updated October 14, 2026
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Overview
PZL Mielec is a Polish aerospace manufacturer based in Mielec in southeastern Poland. Its industrial origins lie in the airframe plant established at Mielec in 1938–1939 as PZL WP-2, part of Poland’s pre-war Państwowe Zakłady Lotnicze system. Aircraft production began shortly before the Second World War with assembly of PZL.37 Łoś bombers. After the German occupation and the removal of much of the factory’s equipment during the German withdrawal, the site returned to Polish control in 1945 and was rebuilt as a state-owned industrial and aviation plant. The post-war factory initially combined aircraft repair, general industrial work and the manufacture of non-aviation products. It built the PZL S-1 trainer, produced LWD utility aircraft, and manufactured licensed CSS-13 versions of the Polikarpov Po-2. In 1949 it became WSK-Mielec, formally Wytwórnia Sprzętu Komunikacyjnego, and for a short period in the 1970s used the WSK Delta-Mielec name. In 1975 the PZL designation was restored in the company’s name. During the centrally planned period, Mielec became Poland’s largest aircraft producer, with employment eventually reaching approximately 18,000 people. A major part of its post-war expansion came from licensed production for the Soviet-led aviation system. Mielec built Lim versions of the MiG-15 and MiG-17 jet fighters, together with Polish trainer and attack variants, and produced the TS-8 Bies and TS-11 Iskra training aircraft. Its largest single aircraft program was the Antonov An-2 utility biplane: approximately 11,954 aircraft were produced at Mielec between 1960 and 2002 in agricultural, transport, passenger, military and floatplane versions. The company also became the exclusive producer of the Antonov An-28 from 1984. Mielec later developed the An-28 into the PZL M-28 Skytruck and Bryza family, incorporating Western avionics and adapting the aircraft for transport, maritime patrol and military missions. The factory also pursued indigenous and collaborative designs. The WSK-Mielec M-15 Belphegor, developed with Soviet assistance, was a distinctive jet-powered agricultural aircraft produced from 1976 to 1981. Cooperation with American partners produced the M-18 Dromader agricultural aircraft, which became one of the company’s most commercially successful products and was exported widely. Other programs, including the PZL M-20 Mewa and PZL M-26 Iskierka, achieved more limited production. Outside aviation, the plant made fire engines, refrigerators, vehicle bodies, engines, television broadcast vehicles and other industrial goods; the Melex electric-vehicle activity was later separated as an independent brand. Following the end of the communist system and the collapse of many Eastern Bloc export markets, production and employment declined. In 1998 the state enterprise was transformed into Polskie Zakłady Lotnicze Mielec Sp. z o.o., commonly known as PZL Mielec. The company obtained JAR-21 certification in 1999. On 16 March 2007, Sikorsky Aircraft Corporation acquired PZL Mielec. Sikorsky retained the PZL Mielec identity while integrating the site into its international manufacturing network. Sikorsky subsequently became part of United Technologies and, following the 2020 separation of United Technologies businesses, PZL Mielec became part of Lockheed Martin’s Sikorsky organization. Under its current ownership, PZL Mielec combines design heritage, airframe manufacturing, final assembly and support capabilities. Since 2009 it has produced fuselage sections for UH-60M Black Hawk helicopters, and since 2010 it has served as an additional final assembly location for S-70i Black Hawk helicopters. It also remains associated with the M-28 family and with aircraft structures and maintenance-related work. The company is therefore best understood as an aerospace industrial site and aircraft brand whose role has shifted from a large state-sector producer serving Soviet and Polish requirements to an internationally integrated manu…
History
PZL Mielec traces its origins to the construction of PZL WP-2, or Airframe Factory No. 2, at Mielec in 1938–1939. The plant belonged to Poland’s pre-war Państwowe Zakłady Lotnicze aviation system. Production started just before the Second World War with assembly of PZL.37 Łoś bombers from components supplied by the PZL plant in Warsaw. At the beginning of operations the site employed roughly 700 workers. After Germany occupied Mielec in September 1939, the factory was incorporated into German wartime industry. It produced components such as Heinkel He 111 tailfins and repaired Junkers Ju 52 aircraft. Employment rose substantially during the occupation. In July 1944, as German forces withdrew, machinery and equipment were removed. Soviet forces took control of the site in August 1944 and initially used it for repair work. The factory was returned to Polish administration in July 1945. The post-war plant was reorganized as a state-owned PZL facility and initially performed repairs and diverse industrial manufacturing. It produced the single PZL S-1 trainer, flew in November 1945, and later built small series of LWD Szpak-4T utility aircraft. In 1948 it began licensed production of the CSS-13, a Polish-built version of the Polikarpov Po-2, and also manufactured Salamandra gliders. In 1949 the plant was renamed WSK-1 Mielec, reflecting the Wytwórnia Sprzętu Komunikacyjnego naming system used across Poland’s aviation industry. It briefly used the WSK Delta-Mielec name between 1970 and 1975 before adopting WSK PZL-Mielec. During the 1950s and 1960s, Mielec became the country’s leading aircraft production center. It manufactured Lim-1 and Lim-2 versions of the MiG-15 and Lim-5 versions of the MiG-17, along with Polish-developed trainer and attack derivatives. Approximately 1,500 Lim-family aircraft were built by 1964. The plant also produced the TS-8 Bies piston trainer and participated in the TS-11 Iskra jet-trainer program. A later attempt to develop the PZL I-22 Iryda encountered funding and program difficulties and resulted in only a small production run. The Antonov An-2 became the defining mass-production program of the factory. From 1960, Mielec built the aircraft in agricultural, passenger, transport, military and floatplane versions. About 11,954 were completed by 2002, most for Soviet customers but also for Poland and other export markets. From 1984, Mielec became the exclusive producer of the Antonov An-28. The company subsequently modernized the design as the PZL M-28 Skytruck and Bryza, adding Western avionics and adapting the aircraft for military transport, maritime patrol and other specialized missions. Mielec’s own engineering work included the M-15 Belphegor, a Soviet-supported jet agricultural aircraft produced from 1976 to 1981, and the M-18 Dromader, developed through cooperation with American companies. The Dromader became a successful agricultural aircraft with extensive Western exports. Other projects, including the PZL M-20 Mewa and PZL M-26 Iskierka, had limited production. The factory also produced non-aircraft goods, including fire engines, refrigerators, microcars, vehicle bodies, engines and electric utility vehicles. The fuel-injection division was separated into a limited-liability company in 1993, while the Melex activity later developed as a separate brand. The collapse of Eastern Bloc markets reduced demand and forced a major contraction in employment and output. In 1998 the enterprise was converted into Polskie Zakłady Lotnicze Mielec Sp. z o.o. and continued using PZL Mielec as its short name. It obtained JAR-21 certification in 1999. On 16 March 2007, Sikorsky Aircraft Corporation acquired the company. The acquisition redirected the site toward international aerospace supply and helicopter manufacturing while preserving its established identity. From 2009, PZL Mielec produced UH-60M Black Hawk fuselage sections, and from 2010 it operated as an additional final assembly location for S-70i Black Hawk helicopters. Sikorsky later became part of United Technologies and then Lockheed Martin. PZL Mielec consequently became a Lockheed Martin company while retaining its Polish manufacturing base and continuing to be associated with the M-28 aircraft, airframe structures, helicopter production and aircraft support capabilities.
- 2010
S-70i final assembly
[1]PZL Mielec became an additional final assembly site for S-70i Black Hawk helicopters.
- 2009
UH-60M structures production
[1]The facility began producing fuselage sections for UH-60M Black Hawk helicopters.
- 2007
Acquisition by Sikorsky
[1]Sikorsky Aircraft Corporation acquired PZL Mielec and retained its established brand identity.
- 1999
JAR-21 certification
[1]The company obtained JAR-21 certification, supporting its participation in regulated aircraft production.
- 1998
Transformation into a limited-liability company
[1]The state-owned factory was converted into Polskie Zakłady Lotnicze Mielec Sp. z o.o., commonly called PZL Mielec.
- 1984
An-28 production
[1]Mielec became the exclusive producer of the Antonov An-28, the basis for the later PZL M-28 family.
- 1976
M-15 Belphegor and M-18 Dromader era
[1]Production of the M-15 Belphegor began, while the M-18 Dromader agricultural aircraft made its first flight and later became a major export product.
- 1975
PZL designation restored
[1]The plant returned to the WSK PZL-Mielec name, linking it again to the historic PZL aviation identity.
- 1960
An-2 production began
[1]Mielec started producing Antonov An-2 utility biplanes, eventually completing nearly 12,000 aircraft in multiple variants.
- 1953
Full-scale Lim jet production
[1]Full production of Lim-1, the Polish version of the MiG-15, began after initial aircraft had been assembled from Soviet-supplied parts.
Products and positioning
A Polish aerospace manufacturing and aircraft-support business combining indigenous aircraft programs with licensed production, airframe structures and Lockheed Martin helicopter manufacturing.
Utility and military transport aircraft · 1984
PZL M-28 Skytruck and Bryza
The M-28 is a Mielec-developed modernization of the Antonov An-28. It uses improved avionics and is configured for short takeoff and landing operations. Variants have served transport, passenger, military, maritime patrol and other specialist roles. The family represents PZL Mielec’s principal indigenous aircraft program in the post-Soviet period.
Agricultural aircraft · 1976
M-18 Dromader
The M-18 Dromader is a single-engine agricultural aircraft developed through cooperation between Mielec and American aviation partners. It was designed for crop spraying and related agricultural work and became one of the company’s most successful non-military aircraft. More than 759 aircraft had reportedly been produced by the period covered in the reference material, with many exported to Western markets.
Utility aircraft · 1960
Antonov An-2
Mielec produced the Soviet-designed An-2 in a wide range of agricultural, passenger, transport, military and floatplane configurations. With approximately 11,954 aircraft completed between 1960 and 2002, it was the plant’s largest aircraft program and a central contributor to its international industrial scale.
Jet fighter and trainer aircraft · 1952
Lim aircraft family
Mielec manufactured Polish versions of the MiG-15 and MiG-17, including Lim-1, Lim-2 and Lim-5, as well as related Polish trainer and attack variants such as SBLim and Lim-6. Approximately 1,500 aircraft in the Lim family were built by 1964, making the program an important foundation of post-war Polish aerospace production.
Military helicopter · 2010
S-70i Black Hawk
Following Sikorsky’s acquisition, PZL Mielec became an additional final assembly site for S-70i Black Hawk helicopters. The program integrated the Polish plant into Sikorsky’s international helicopter manufacturing system and shifted part of the company’s role toward global defense production rather than only indigenous fixed-wing aircraft.
Helicopter structures · 2009
UH-60M Black Hawk fuselage sections
PZL Mielec manufactures fuselage sections for UH-60M Black Hawk helicopters. This work is a key example of the company’s current role as an aerospace structures supplier within the Lockheed Martin and Sikorsky production network.
Controversies
2008
Criticism of the privatization and M-28 purchase
Polish military press criticized the circumstances of Sikorsky’s acquisition of PZL Mielec, alleging that the sale price was unusually low and that pro-American lobbying influenced the transaction. Reports also criticized Poland’s purchase of 12 M-28B aircraft from the new owners, alleging that the price was substantially above comparable export or market values. The supplied reference presents these as criticisms and allegations, not as conclusively established legal findings.
Brand decisions
2010
Expand into S-70i final assemblyProduct launchBackground
Sikorsky sought additional production capacity for the S-70i Black Hawk export helicopter.
Action taken
PZL Mielec began serving as an additional final assembly line for S-70i helicopters.
Aftermath
The company broadened its current manufacturing role from aircraft structures to complete helicopter assembly.
2009
Add Black Hawk structures manufacturingStrategyBackground
The acquisition created an opportunity to use Mielec’s airframe manufacturing capabilities for Sikorsky helicopter programs.
Action taken
PZL Mielec began producing UH-60M Black Hawk fuselage sections.
Aftermath
The facility became an integrated supplier within an international helicopter production chain.
2007
Join Sikorsky AircraftM&ABackground
After the decline of many Eastern Bloc markets and a long contraction in production, PZL Mielec required a stronger industrial and international position.
Action taken
Sikorsky Aircraft Corporation acquired the company while retaining the PZL Mielec brand.
Aftermath
The company became part of Sikorsky’s global manufacturing network and later entered the Lockheed Martin group through corporate ownership changes.
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