If a crack forms in the propellant grain of an assembled solid motor, what immediate performance result can occur?

Answer

It creates an unauthorized increase in the exposed burning surface area, leading to higher pressure

An increased burning surface area results in higher chamber pressure and thrust than designed, potentially causing catastrophic over-pressurization.

If a crack forms in the propellant grain of an assembled solid motor, what immediate performance result can occur?
Aerospacedisadvantagerocketpropulsionsolid rocket