I think that it likely that there was a major fault in the lookout.

They replaced the defective TV with a new one.

They checked the machine for defects.

The vehicles are inspected for defects at least every three months.

I can't find any holes in his theory.

His lack of technical knowledge precluded him from promotion.

His experiment had many faults in its details.

The errors apparent in his results are due more to carelessness than faulty procedures.

Party leaders are grappling with flaws in the party system.

Manufacturers are liable for defects in their products.

Boeing, which builds more than half the world's commercial airliners, is understandably keen to draw attention to what can go wrong besides planes.

Crashes in the early days of commercial jets tended to be caused by technical faults, such as metal fatigue in the airframe or engines.

The vehicles are inspected for defects at least every three months.

There must be a defect in the experimental method.

Recent investigations have demonstrated that the application of Emmet's theory is not always without defects.

What defect can you find in the present system of education?

We detected a great fault in the system.

The experiment failed because of some minor faults.

The customer insisted on a price reduction because of defects in the product.

As your goods for which you are charging us were imperfect, we will not pay this account.