Ref: G.B.Sense.
RAT 5 "Am I missing something?"
- yes
So a 737 has to be within 1200 miles on two but a quad, with all of it's extensive systems redundancy, has to be within 1200 miles on three.
It's definitely a worry that people think its ok to run around on one because its "ETOPS" but down to three engines on a quad is dangerous - weird world - glad I'm retiring.
barking !!
Just to correct your mistaken impression of my thinking. I did not say a 3/4 engine a/c had to be within 1200nm of suitable. I do not know the rules and that is why I asked the question. It has not been answered by those in the know, so I am still ignorant of the rules. I do not profess to pontificate on things about which I do not know 100% of facts. IMHO maybe, but not factual statements.