After initial photography on May 11, 1967 problems started occurring with the camera's thermal door, which was not responding well to commands to open and close.

This required extra attitude control maneuvers on each orbit to prevent light leakage into the camera which would ruin the film.

Continuing problems with the readout drive mechanism starting and stopping beginning on May 20 resulted in a decision to terminate the photographic portion of the mission on May 26.

Radiation data showed increased dosages due to solar particle events producing low energy protons.

The spacecraft was used for tracking until it struck the lunar surface due to the natural decay of the orbit no later than October 31, 1967, between 22 and 30 degrees W longitude.