I can't find the report itself but the submitted testimony and hearing is here* In particular Collins' submission has this:
>787 Lithium-Ion Battery Containment:
>Before the AIR Safety Review Process was implemented in mid-2015, there were other examples of FAA management accepting applicant’s positions over the concerns of FAA technical specialists, the FAA’s aerospace safety engineers. For example, during initial certification review of the new technology 787 lithium battery system design the certification of the 787, an FAA technical specialist determined the lack of a fireproof enclosure could result in catastrophic failure due to uncontrolled fire from the battery. He proposed to FAA management that the special conditions design of for the airplane system lithium-ion battery should include a requirement for a steel containment structure that would be vented overboard. FAA management overruled the specialist. The specialist worked to modify a new special condition that was applied to the battery installation so a containment system would be required. Unfortunately, FAA managers pushed to delegate 95 percent of the certification to the applicant, including the high risk, new technology, battery installation. Without FAA safety engineer oversight, the ODA found the design without an enclosure to be compliant. Sadly, after certification, the airplane system lithium-ion battery experienced two extremely dangerous fire events and the FAA mandated the 787 fleet to be grounded. The design changes the FAA mandated to allow the 787 to fly again included a steel battery containment box that was vented overboard; as originally proposed by the FAA aerospace engineer.
I saw the pictures of the 787 lithium-ion battery fire aftermath ... the entire equipment rack was a charred mess. In other words, a raging fire happened in the hold.
The only initial San Jose Terminal 3 ($1.2+ billion) international airline was JAL, and they had to stop flying for about a year. This was a terrible blow to the airport.
The engineer who advocated a battery box was not just correct, but following basic principles - even the Cessna 172 has a metal battery box:
Heck, I even tell IT departments to use a stainless-steel "bathtub" under water-cooled computer systems. Each time I'm called a Cassandra, until it starts leaking, then it's like, "Well of course. Anybody would do it that way."
Is this document publicly available now? Did anyone find it?