1. SOUNDBITE (English) Najm Meshkati, University of Southern California aviation safety professor:
"The issue of the parts is very important. The authenticity of the parts because the parts which are authentic that have been going through a lot of tests and retesting and quality control checks. And the issue is that when you have a bogus part, if you have a fictitious part being used, you don't know what's going to happen to that part. If it's up to the tolerance, up to the measurement or not. And the issue is that unlike your car if you put a bad part in that and something breaks down you can pull the car to the side of the road and call Triple A. There is not such a thing in the case of aviation. In the case of aviation, there are some parts that are very critical and they could have a very deterministic and decisive impact on the safety and reliability and integrity of your system. And that's why if we have parts that are not real, if we have parts that they have not they are not up to the standards set by the manufacturer and they don't satisfy the test then they could cause some problem. They could basically eventually fail. They may not fail today. They may not fail tomorrow. But it's like playing Russian roulette. I think it looks good for FAA because that means that that day really doing their job and I wish they did the same level of scrutiny in some other cases that we are now causing the grounding of 400 737 MAX. I think FAA should be saluted for this. I don't know was it the fault of Boeing? Was it the fault of their system that they put in place or maybe they have made changes in statistical quality control that they use?"
Renton, Washington – 30 March 2016
2. Various of exterior of Renton Boeing plant, Boeing signs
Renton, Washington - 27 March 2019
3. Various of 737s under construction
Los Angeles – 3 June 2019
4. SOUNDBITE (English) Najm Meshkati, University of Southern California aviation safety professor:
"The issue that we are seeing about 737, the way that it was designed, the way that it was launched, the way that it was certified by the FAA, this whole system puts to question the launching of this aircraft and I think is for the first time that the action or inaction of a company in United States and its regulator, Boeing and FAA, affects the lives and well-being of hundreds of thousands of people around the world. So this is a very important issue."
Boeing is telling some airlines flying its 737 model to replace a part on the planes' wings, a move that could affect more than 100 aircraft.
Boeing said on Sunday that it is working with the Federal Aviation Administration and contacted airlines about potential problems discovered in one batch of "slat tracks" produced by a supplier.
"In the case of aviation, there are some parts that are very critical," said Najm Meshkati, a research professor of aviation safety at the University of Southern California Viterbi School of Engineering.
"They may not fail today. They may not fail tomorrow. But it's like playing Russian roulette," he said.
The company said it has identified 21 planes most likely to have the parts in question, and it's advising airlines to check an additional 112 planes. The replacement work should take one to two days after the parts are in hand.
That total does not include the 179 737 Max aircraft that could also have the parts in question. The 737 Max was grounded worldwide following two crashes involving the model.
Meshkati applauded the FAA, saying it means regulators are "doing their job."
"I wish they did the same level of scrutiny in some other cases that we are not causing the grounding of 400 737 MAX.