Li-ion 787 certification special condition
The FAA issued a Special Condition for the use of li-ion batteries on the 787. Boeing made several design provisions for control of fire and smoke spread.
Recent incidents suggest these may not have been sufficient.
It will be interesting to see FAA's reaction, and how quickly Boeing can address what may be a significant issue.
Freighters, after several hull losses, can no longer carry these batteries as cargo. It is surprising that even with special provisions the FAA has allowed passenger aircraft to have them designed in.