180 minutes ETOPs for older RR powered 777, (777-200ER 777-300) these aircraft have 5 fire bottles for the cargo holds fire suppression, probably airlines specs.
207 minutes ETOPS for GE powered 777-200LR and 777-300ER 6 fire bottles for cargo hold fire suppression.
How many fire bottles will be required for ANZ 777-200ERs?