What is the amount of compensation due for the damage to the pump that was in my company's possession, and which I was unable to repair and return to its owner? Is it the amount he requested, or its market value? And if it is its market value, should it be estimated at the market price at the time of its receipt or currently, and on the basis that it is damaged or new?

The activity your company performs in equipment maintenance falls under what is known as a shared employee (Al-Ajeer Al-Mushtarak). The guarantee of a shared employee for damaged goods is a matter of scholarly disagreement. If you forget a pump and do not return it to its owner until it is damaged, you are responsible for its value. Specialists estimate its value at its price on the day it was damaged.