Topic Author
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Joined: Sun Jul 31, 2005 11:05 pm

No ETOPS For GEnx And Trent 1000?

Sun Apr 26, 2009 4:31 pm

From the GEnx TCDS:

"NOTE 20.
The GEnx-lB54/1B58/1B64/lB67/1B70 engine models are not ETOPS eligible. They do not meet the requirements of 14 CFR Part 33 amendment 33-21, section 33.201."

And from the Trent 1000 TCDS:

"NOTE 13. These engines are not ETOPS eligible according to provisions in FAR 33.201"

I do know that engine/airframe combinations must be certified for ETOPS. However, the fact that an engine is not "eligible" for ETOPS sounds starnge. Can anyone explain?

Exceptions confirm the rule.
Posts: 5808
Joined: Fri May 21, 2004 7:13 am

RE: No Etops For GEnx And Trent 1000?

Sun Apr 26, 2009 5:36 pm

I'm no expert, but looking at FAR 33.201 which is

Design and test requirements for Early ETOPS eligibility (my emphasis)


I presume that the respective engines probably haven't run up enough hours to satisfy the various testing requirements.
wheat and dairy can screw up your brain
Topic Author
Posts: 4017
Joined: Sun Jul 31, 2005 11:05 pm

RE: No Etops For GEnx And Trent 1000?

Sun Apr 26, 2009 7:01 pm

Quoting Oly720man (Reply 1):

Ah, that explains it. Thank you!
Exceptions confirm the rule.

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