|Launch vehicle||H 2|
|Launch site||Tanegashima Space Centre, Tanegashima, Japan|
|Description||Second stage partial failure|
|Cause||Cumbustion chamber leak|
|Payload||Comets [Takehashi] (Experimental satellite, NASDA, Japan)|
|Desired orbit||Geostationary transfer orbit|
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.