Old 10th Apr 2019, 19:08
  #26 (permalink)  
Pilot DAR
Join Date: Aug 2006
Location: Ontario, Canada
Age: 60
Posts: 4,854
Boeing as a manufacturer has No means to ground a fleet so as to damage the goods that others have purchased. Boeing's responsibility is to provide fixes for known problems with a suitable reccomendation for incorporation (ALL this under the rule of Continued Airworthiness).
I see it differently: If Boeing chose to issue the highest level of service bulletin asking operators to not operate the aircraft for safety reasons, pending resolution, and then asked the FAA to make it mandatory by AD, I expect that there would be an AD issued to ground the FAA regulated fleet within hours, and much of the world's fleet would be similarly regulated shortly thereafter. What regulator would decline to ground a fleet at the manufacturer's request with good cause?

Yes, Boeing, as any manufacturer, is required to technically support their product, after they have taken any action necessary to assure safety.
Pilot DAR is offline