What you on about 411A
this is for 411A
What are you chirping about, you obviously dont know your engines too well and the only thing you seem to know about are Rolls Royce, most problably only the RB211. I suppose you got stuck on the 1 engine variant Tristar and now with your total lack of engine knowledge, or reduced experience think you can bad mouth other motors. I have personnally seen 2 RB211 explode on takeoff, never seen a Pratt explode.
Maybe you need to do some home work on the JT9-7R and 7Q.
Plus the GE is also far more superior to the Rolls.
So concentrate on the topic and not your limited chirping experience OK