}}</ref> On a 21 May 2009 [[Miami]]-–[[SaoSão Paulo]] [[TAM Flight 8091]] registered as PT-MVB, and on a 23 June 2009 [[Hong Kong]]-[[Tokyo]] [[Northwest Airlines]] Flight 8 registered as N805NW each saw sudden loss of airspeed data at cruise altitude and consequent loss of ADIRS control.<ref>{{cite press release| url=https://www.ntsb.gov/news/2009/090625a.html |title=NTSB investigating two recent incidents involving possible A-330 speed and altitude indication anomalies |publisher= [[NTSB]] |date=25 June 2009 |access-date=14 October 2011}}</ref><ref>{{cite web |title=Brief of Incident |url=https://www.ntsb.gov/_layouts/ntsb.aviation/GeneratePDF.aspx?id=DCA09IA055&rpt=first |date=18 July 2011 |publisher=NTSB }}</ref><ref>{{cite web |title=Brief of Incident |url= https://www.ntsb.gov/_layouts/ntsb.aviation/GeneratePDF.aspx?id=DCA09IA064&rpt=fi |publisher=NTSB |date=27 June 2011 }}</ref>
