The Malaysian ICAO Annex 13 Safety Investigation Team for MH370 published Interim Statements on 8th March each year from 2015 to 2018 inclusive.
Malaysia Airlines flight MH370 went missing on Saturday, 8 March 2014.
The first report on the incident was a Preliminary Report compiled by The Chief Inspector of Air Accidents, Department of Civil Aviation, Malaysia. The report was released (to the ICAO) on 9 April 2014 and then to the public by the Ministry of Transport on 1 May 2014 with several supporting documents. See the Media Release for details.
The Malaysian ICAO Annex 13 Safety Investigation Team for MH370 was instituted by the Minister of Transport (Malaysia) on Friday, 25 April 2014. The Team commenced the international investigation in accordance with ICAO Annex 13. As shown in the extract below, the investigating team must publish an Interim Statement on each twelve-month anniversary of the incident, until the release of a Final Report.
Release of the Final Report
6.5 In the interest of accident prevention, the State conducting the investigation of an accident or incident shall make the Final Report publicly available as soon as possible and, if possible, within twelve months.
Note.— Making a Final Report publicly available can be achieved by posting the Final Report on the Internet, and does not necessarily require a hard-copy publication of the Final Report.
6.6 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 the progress of the investigation and any safety issues raised.
6.7 When the State that has conducted an investigation into an accident or an incident involving an aircraft of a maximum mass of over 5 700 kg has released a Final Report, that State shall send to the International Civil Aviation Organization a copy of the Final Report.
Source: ICAO Annex 13, Release of the Final Report
To comply with Para 6.6 above, The Malaysian ICAO Annex 13 Safety Investigation Team for MH370 published Interim Statements on 8th March each year from 2015 to 2018 inclusive.
The similarity of each Statement reflects the sad fact that the aircraft wreckage had not been located; flight data recorders had not been found; and, apart from recovery of some debris, no significant new information was available.
The Team produced the SAFETY INVESTIGATION REPORT MH370/01/2018, in the same format as a Final report, in mid-2018 and consequently there have been no Interim Statements since 8th March 2018.