The --2B variant is not mentioned and must be added in the next revision. Up to now this variant is NOT certified.
Quoting tdscanuck (Reply 2): As they do modifications, those are certified "in-line", just like service bulletins on an aircraft. You don't re-issue a type certificate every time you modify the design.
With major changes (as performed on the -1B during the last two years ,since certification) the Type Certificate will probably be amended by issuing a new revision, with updated modification (SB) status, mostly done via added remarks.
Operating a twin over the ocean, you're always one engine failure from a total emergency.
747classic From Netherlands, joined Aug 2009, 2416 posts, RR: 15
Reply 3, posted (5 years 1 month 1 week 2 days 12 hours ago) and read 2200 times:
The GEnx-1B will be re-certified and the -2B certified in July 2010.
"We will re-certify all improvements [to the -1B] in July," says GEnx programme manager Tom Brisken. "Meanwhile, testing is complete on -2B and certification reports have been submitted." GE had initially gained US Federal Aviation Administration certification for the -1B engine in March 2008, but durability and operability issues with the fuel nozzles in the lean-burn combustors and the advent of delays in the 787 programme gave GE time for a redesign that must now be recertificated.