5503

5503 is a Shenyang Aircraft Corporation J-8, a twin-engine jet. SkyMeter has tracked 8 flights totalling 2 hours of airtime via ADS-B across 2 callsigns. Service window in our records spans 87 days. The Shenyang Aircraft Corporation J-8 has a maximum takeoff weight of 39,683 lb, medium wake category.

About the Shenyang Aircraft Corporation J-8

The Shenyang J-8, known to NATO as Finback, represents China's first domestically designed supersonic interceptor, entering service with the People's Liberation Army Air Force in 1980. Developed by Shenyang Aircraft Corporation as an enlarged twin-engine evolution of the MiG-21 concept, the J-8 was conceived during the Cold War to counter high-altitude reconnaissance threats and provide beyond-visual-range interception capability. The aircraft features side-mounted air intakes, a distinctive twin-engine configuration with Liyang WP-7 turbojets, and a maximum speed exceeding Mach 2.2 at altitude.

While the original J-8 variant proved underpowered and limited in avionics, subsequent J-8II models introduced a redesigned nose intake, improved radar, and compatibility with semi-active radar-homing missiles, significantly enhancing combat effectiveness. The type gained international attention in 2001 following a collision with a U.S. Navy EP-3 reconnaissance aircraft over the South China Sea.

Though largely superseded by more modern fighters like the J-10 and J-11 in frontline service, the J-8 remains operational in specialized roles including reconnaissance and training, representing an important milestone in Chinese military aviation self-sufficiency. SkyMeter has tracked flights across airframes and operators over routes.