Intelsat IV F-6 commercial communications satellite intended for geosynchronous service. Atlas SLV-3D Centaur (AC-33) from Cape Canaveral LC-36A failed on 20 February 1975 when a booster-separation lanyard fault reset guidance; range safety destroyed the vehicle short of orbit.
- Outcome
- Failure
- Orbit
- Direct-GEO
- Geostationary orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 5th
- of 32 Atlas SLV-3D Centaur flights
- Date and time
- 20 February 1975, 23:35 UTC
- Rocket
- Atlas SLV-3D Centaur
- Builder
- Convair
- Launch site
- Launch Complex 36A, Cape Canaveral SFS, FL, USA
- Payload
- Communications
- Launches in 1975
- 14th of 132