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Long March 7A Rocket Explodes 85 Seconds After Liftoff, ChinaSat‑4B Lost

Chinese authorities opened a formal probe to determine whether an early‑ascent anomaly or a fault in shared YF‑100 engines could affect other scheduled launches.

Overview

  • Video from the Wenchang launch site shows the Long March 7A breaking apart about 85 seconds after liftoff on Monday, destroying the vehicle and its ChinaSat‑4B communications satellite.
  • State media later confirmed the mission failed and officials have launched an investigation that will rely on telemetry, tracking data and flight cameras to reconstruct the event.
  • Analysts point to an early‑ascent failure window near MaxQ as investigators focus on engines, structure and flight‑termination actions rather than later‑stage separation faults.
  • The Long March 7A uses YF‑100 kerosene/oxygen engines that are also deployed on other Chinese rockets, creating uncertainty about checks or schedule changes for near‑term launches though some missions use different engines.
  • The rocket’s loss highlights program risks: the 7A is a key high‑orbit launcher, the satellite carried both civilian and possible military communications uses, and social media footage spread widely while some state platform posts were limited.