GPS-7
Failure
DEC 19198101:10:00 UTCB-2 engine shutdown at T+7 seconds due to sealant plugging up the gas generator; vehicle destroyed by Range Safety Officer just before impacting the ground at T+20 seconds.
LIFTOFF
DEC 19 198101:10:00 UTC
Failure
launched from SLC-3E Vandenberg
aboard Atlas E/F-SVS 76E into MEO
Payload
GPS-7
Navigation satellite