Raduga 33
The upper stage (Block-DM2) failed to restart after first burn to circularize
the orbit. Thus the satellite remained in GTO. Failure analysis determined that
at second ignition of the Block DM, the main engine experienced an emergency
commanded shutdown. The probable cause of the failure was a pressure leak in
the engine start system. The leak was most likely caused by an inadequate
lockwire installation on a start system tube joint nut, which allowed the nut
to back off under vibration. Corrective actions include increasing the lockwire
diameter and adding a second, redundant lockwire to the affected joint.
Out
of service
|
19
Feb 1996
|
Cause
|
Launch
failure
|
Decay
|
6
May 2004
|
sat-index articles
Specifications
C-band