sb_sfo,
Thanks for the MMEL reference. 4 ED gennies does seem a safe situation to start ETOPS 180, particularly as you have the Main battery and the RAT to cater for a (temporary) double flameout.
The double engine failure, leading to a forced landing/ditching, is not part of the ETOPS remit, I guess, but the Main battery and RAT should give you enough EIS to perform it.
Last edited by Chris Scott; 23rd January 2013 at 15:04.
Reason: Typo