Perhaps you may want to draw attention to why a true cause of such a calamitous fire would be unwelcomed by both the industry and the oversight agencies >>>>>

The reality of in-flight fires has been long-known with many warnings of flammable acoustic insulation materials becoming fuel for electrical abnormalities.  Seen earlier in 1991 in the FAA Tech Center document, "Development and Growth of Inaccessible Aircraft Fires Under Airflow Conditions" (DOT/FAA/CT-91/2), a August 9, 1996 "Douglas All Operator Alert", a August 6, 2004 "Boeing Service Letter", "Preventing Contamination That Affects Flammability Of Insulation Blankets", (and, within that, a reference to an earlier letter dated March 23,1998).  Removal of these flammable materials then would have resulted in devastating costs to the industry, likely a lengthy grounding of the fleets, and undermined the public trust in the FAA's certification process - an FAA that had accepted industry tests rather than conduct their own.  Instead, and by allowing the mandatory AD (2008-23-09) for Boeing to run eight years more to December 2016,  the industry was allowed time to 'retire' these Boeing fleets.  However, one model remained exempt, the 777.  

JK