ICAO Annex 13 requires that State conducting investigation of an accident shall make the Final Report publicly available “if possible” within twelve months. Indonesia achieved this for QZ8501 and will strive to do so for JT610.
Annex 13 further requires that if the report cannot be made publicly available within twelve months, the State conducting the investigation shall make an interim statement publicly available on each anniversary of the occurrence – detailing progress and any safety issues identified.
Personally I don’t see that Boeing/FAA Corp. can risk opprobrium of a return to service before Indonesian publishes at least a second interim report.
Boeing/FAA Corp. returned 787 to service before NTSB’s damning critique of how hazardous batteries slipped thru certification - see NTSB Report 2014/AIR1401.
“Boeing’s electrical power system safety assessment did not consider the most severe effects of a cell internal short circuit ..., and the review of the assessment by Boeing authorized representatives and Federal Aviation Administration certification engineers did not reveal this deficiency.
Boeing failed to incorporate design requirements ....to mitigate the most severe effects of a cell internal short circuit, and the Federal Aviation Administration failed to uncover this design vulnerability ...
Unclear traceability among the individual special conditions, safety assessment assumptions and rationale, requirements, and proposed methods of compliance for the 787 main and auxiliary power unit battery likely contributed to the Federal Aviation Administration’s failure to identify the need for a thermal runaway certification test.”
Let’s not do it again!