A Phillies game for those impacted by plane crash

What does it mean when the teacher flunks the exam he’s teaching?
What does it mean when three teachers flunk the exam they’re teaching?

Three Jet Airways examiners flunked the DGCA exam, Manoj Manha and M. Shain had “inadequate subject knowledge” of the Airbus they are purported to be experts of and Anupam Khanna was “casual” and “lacking in cockpit discipline.” Manha and Shain will be continuing as examiners after corrective training.

The deficiency casts a shadow on all of those whose expertise was qualified by Manha, Shain and Khanna.

It means that if the DGCA is going to follow through and maintain standards, every person qualified by these examiners (or otherwise taught by them) is scrutinized and retested.

Can pilots be deemed competent when they have been trained by incompetents?