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In response to
"Jeez... why aren't they immediately grounding all aircraft? -- nm"
by
Mop🧹
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Cause the aviation industry is super paranoid and was set up for exactly something like this. There's a better than blockchain chain of custody for -- (edited)
Posted by
JD (aka Jason Dean)
Sep 22 '23, 14:42
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critical parts so it's not necessary to ground all planes.
Actually, let's go back a step.
Grounding all planes would be similar to recalling all cars cause it was found out that counterfeit parts were being used in four cylinder engines.
Ok, so not all cars use four cylinder engines so there's not practical basis for that.
Then it's only one manufacturer's engines that use the parts in question. So why should a GM / Ford / BMW four cylinder car be recalled cause there's some four cylinder Toyota engines that might have received the counterfeit parts.
So that's why 777's or A380s or A350's as well as whole list of planes that don't use CFM56 and CF6 engines.
So now we're down to a rather specific subset of engines and here's where the high cost of airplane parts comes into play. Part of the high cost is the costs associated with QA and certification and tracking of parts.
So the company that is at the heart of the problem and issued the fake certs is not a primary manufacturer but essentially more of a distributor. However in order to sell the parts to aircraft owners/operators, they had to provide the paper chain. A chain that has to be logged by the customers when they put the parts in to use (i.e. install them in an engine)
So now, there's a super definable, tracked, subset of engines that have had parts installed that were supplied by the discredited supplier.
So instead of a 9/11 type ground halt (grounding all planes) and laboriously checking every part, on every damn plane, the affected owners / operators can ground a subset of planes as well as they don't necessarily have to do that as they can opt to not fly a plane long enough to replace an impacted engine with one that has none of the questionable parts.
The questionable engine can then be checked.
Or in the practical worse case, the impacted plane can be grounded long enough to perform the check.
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