H 2
Launch vehicle H 2
Launch site Tanegashima Space Centre, Tanegashima, Japan
Date/Time 1998-02-21
Description Second stage partial failure
Cause Cumbustion chamber leak
Payload Comets [Takehashi] (Experimental satellite, NASDA, Japan)
Desired orbit Geostationary transfer orbit

The second stage of the H2 shut down after 44 seconds--it should have been 192 seconds. The payload, the experimental Comets satellite (a.k.a. Kakehashi [bridge]) was left in a rather useless orbit of 250 x 1901 kilometers.

About seven seconds before the engine stopped, a series of malfunctions had occurred, including damage to the electricity system and the overheating of various engine parts.

NASDA suspects that there was a leak of at least 5 cm2 that let some of the hot fuel gas escape from the combustion chamber. The gas damaged the system of pipes and electricity wires and eventually stopped the engine.

Launch Failures Chronology