Zond failed missions

The first series, based on the 3MV planetary probe, was intended to gather information about nearby planets.

The second series of test spacecraft was intended as a precursor to crewed circumlunar loop flights, using a stripped-down variant of Soyuz spacecraft, consisting of the service and descent modules, but lacking the orbital module.

The rocket crashed 65 km downrange and ended the attempted Lunar flyby.

A second stage failure occurred and the launch vehicle crashed 300 km downrange.

The fault was found to be a short circuit in the control system that caused engine 2 of the SL-12/D-1-e second stage to shut down.

The Proton first-stage booster rocket and the Zond spacecraft had only minor damage.

[7] Zond 1969A was launched on 20 January 1969, a Soyuz 7K-L1 s/n 13, was to be a lunar flyby and return to Earth with pictures.

The escape tower fired and the Zond craft was returned to Earth safely.

[8][9] Pyrotechnics and propellant leaks led to electrical interference in the KORD avionics system.

At 68.7 seconds into flight these electrical failures caused the KORD system to shut down all 28 remaining engines.

[9] The Zond L1S-2 (Zond-M 2) mission was to be the second test of the N-1 rocket engine, moded SL-15/N-1.

The Zond escape tower fired and the capsule landed clear of the launchpad, about 1 km away.