The Cygnus encountered a field of meteorites and was disabled.
5 seconds sound clip from the The Black Hole (1979) movie soundboard.
You can hear this line at 00:28:33.429 in the Blu-ray version of the movie.
Quote context
[...]
- And you are his daughter. Yes. The same eyes. The same eyes.
- And the rest of the crew? They didn't make it back?
- Pity. It was such a good crew.
- What happened when your mission was recalled?
- Now, don't be frightened. Nobody's going to harm you.
- The Cygnus encountered a field of meteorites and was disabled.
- Our main and auxiliary communication systems smashed. We were adrift.
- I told the crew to abandon ship, to return home as ordered.
- Perhaps it was another of what you term my theatrical gestures, but I chose to remain aboard.
- Your dear father chose to remain with me.
- We never knew what happened to the others.
[...]