Aerospace and defence company Boeing is reportedly testing the flight-deck windows of several 787 Dreamliners to ensure that they meet requirements.

The scrutinisation came as the manufacturer expanded its search of potential manufacturing flaws that have resulted in delaying aircraft deliveries, Bloomberg reported, citing people aware of the development.

Boeing is testing the cockpit windows in a limited batch of aircraft after it learned that a supplier revised its methods of production in December 2020.

The testing is being done as a precautionary measure to confirm that the windows continue to meet Boeing’s requirements following the change.

However, it is reported that testing is not expected to affect deliveries for this month.

A supplier modifying its manufacturing process usually does not garner attention. However, given that Boeing is currently under scrutiny by regulators and customers following two fatal crashes involving its 737 Max and several production flaws, the manufacturer is ensuring that the modified processes meets all requirements.

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Since late last year, the company has been working with suppliers to find out the manufacturing flaws in its 787 Dreamliner aircraft.

Last September, the FAA initiated an investigation on manufacturing flaws in some of its 787 Dreamliner planes after Boeing grounded eight of the jets, which were made in South Carolina.

Since October 2020, the company has temporarily ceased deliveries of any Dreamliner after discovering tiny dimples in the inner lining where the carbon-fibre fuselage barrels are fused to form the jet’s frame.

Last month, Dreamliner nose and cockpit supplier Spirit AeroSystems said that it was conducting an engineering analysis of ‘nonconformities’ on its part of the carbon-fibre frame.