Re: ETOPS question on Aer Lingus A330

Date:         25 Nov 97 03:26:07 
From:         kls@ohare.Chicago.COM (Karl Swartz)
Organization: Chicago Software Works, Menlo Park, California
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>>>A carrier operating 767-300ERs with PW4000 engines may have worked up
>>>to 180 min authority, but if they added some 767-300ERs with CF6-80C2
>>>engines ...

>>Now why would any airline be crazy enough to do that?!  Oh, I forgot
>>you work for the engine-type-of-the-month club, er, Delta.  :-)

>Qantas has both JT9D- and CF6-powered B767s.

Yes, though they bought the JT9D on their 767-200s, then switched to
GE for their 767-300s.  There's also UPS, with PW2000s on their early
757s, then RB.211s on the later ones.  In each case, they switched to
what they felt was a better (operationally and/or financially) engine.

Malasian, I believe, bought 747s with engines from all three
manufacturers, at the behest of their government.  Not very logical,
but sometimes one doesn't have much choice.

The Delta comment was a bit of an inside joke, however.  Several
friends who read the group know that I've long been befuddled by
Delta's 767 engine choices, which unlike the Qantas and UPS cases make
no sense whatsoever, IMO.  First, Delta bought the 767-200 with GE
engines.  They stuck with GE for their 767-300 orders, too.  Fine so
far.  Then, they decided to buy 767-300(ER)s.  Rather than buying more
GE engines, they equipped these aircraft with PW4000s, an engine with
which they had no experience and which has a lower in-flight shutdown
rate than the GEs they were already flying.

While taking delivery of these PW4000-equipped 767-300(ER)s, Delta was
concurrently taking delivery of brand-new CF6-80-equipped 767-300s for
domestic use.  They finally switched to the PW4000 for their last two
non-ER 767-300s, creating yet another subfleet.  Now they've gone and
ordered more 767-300(ER)s and guess what engines they have?  Nope, not
PW4000s like the earlier ERs, these will have CF6-80 engines!

Looking beyond the 767s, Delta has a menagerie of other engines -- the
JT8D (727 and 737-200), JT8D-200 (MD-80), CFM56 (737-300), IAE V2500
(MD-90), PW2000 (757), and RB.211 (L-1011).  Their 777s will have RR
Trents.  They again got rid of the JT9D (in addition to the A310-200s,
they had them for the short time they had 747s).  Other than exotic
stuff like the RR Olympus (Concorde) and Russian engines, the only
other large jets I can think of which Delta does *not* have are the
RR Tay and related engines and the BMWRR BR700-series.  Now that the
MD-95 is a Boeing product, they can add some BR700s without straying
from their stated intent of buying only Boeing.

Whoever created this mess must be insane.  IMO.  :-)

Karl Swartz	|Home
Moderator of sci.aeronautics.airliners -- Unix/network work pays the bills