[3] The mission experienced a helium leak in the system that pressurized the liquid-fuel vernier engines that could have resulted in failure.

A miniature chemical analysis lab using an alpha particle backscatter device was used to determine the lunar surface soil consisted of basaltic rock.

The spacecraft had a basic triangular structure of aluminum tubing that provided mounting surfaces for engineering and scientific equipment.

Instrumentation for this spacecraft was similar to that of the previous Surveyors and included landing legs, a Vernier propulsion system, and numerous engineering sensors.

A miniature chemical analysis lab using an alpha particle backscatter device was used to determine the lunar surface soil consisted of basaltic rock.

The spacecraft had a basic triangular structure of aluminum tubing that provided mounting surfaces for engineering and scientific equipment.

After being shut down during the lunar night, more than 20 days, the camera responded to commands and transmitted an additional 1,048 pictures between October 15 and 23, 1967.

One system, containing two sensors, detected the energy spectra of the alpha particles scattered from the lunar surface, and the other, containing four sensors, detected energy spectra of the protons produced via reactions (alpha and proton) in the surface material.

A digital electronics package, located in a compartment on the spacecraft, continuously telemetered signals to earth whenever the experiment was operating.

The spectra contained quantitative information on all major elements in the samples except for hydrogen, helium, and lithium.