Facts
Brazilian Air Force just made an announcement with the following facts. Local times(LT) are given based on Brasilia official time (valid for this area)
19:30LT/22:30Z: Departure from GIG
22:33LT/01:33Z: Last contact made on VHF with Cindacta III (Recife Centre) on INTOL position (more or less 310Nm from Natal VOR, on UN873 airway), informing it was estimating TASIL position (around 670Nm from Natal VOR on the same airway) at 23:20LT/02:20Z
22:48LT/01:48Z: Flight left area covered by Recife Centre ATC radar, and it was cruising normally at FL350 with TAS 453KT
23:20LT/02:20Z: No radio contact was made (this time the flight would be already talking to Atlantico Centre on HF) and Dakar Oceanic was informed about this.
Today morning, Air France informed that around 50Nm after TASIL position, the flight informed (my remark: not sure if via SATCOM, ACARS message or both) electrical problems and pressurisation problems as well.
BF