Originally Posted by
hammerhead
I don't know much about planes but in this modern time I would look to software - in the trucking industry with high emission expectations mandated by the gov. Brand new trucks have a gazillion sensors and sensitivity to emissions and are D rating and shutting down in their tracks. Many times on the open road. The new systems also require very expensive routine emissions maintenance that usually get push aside or not done due to urgency and to reduce down time - I could believe it to software