Now it comes out. Shipment not properly labeled. Similar to fatal crash in Dubai?:

The final report of a UPS B747 crash in Dubai in 2010, details how that crew similarly attempted to depressurise the freighter aircraft to slow down the fire 30 seconds after the loss of aircraft systems and flight controls. In that accident in which there were no survivors, the time interval between fire detection and the onset of aircraft system failures was around two and a half minutes....Vincent remains convinced however that a fire which started in the cargo hold progressively and serially destroyed the aircraft’s communications systems; toxic fumes quickly overwhelmed the passenger cabin and the cockpit where at least one of the flight crew managed to don an oxygen mask allowing them to turn the aircraft back to either Kuala Lumpur or Pulau Langkawi.....Vincent remains convinced however that a fire which started in the cargo hold progressively and serially destroyed the aircraft’s communications systems; toxic fumes quickly overwhelmed the passenger cabin and the cockpit where at least one of the flight crew managed to don an oxygen mask allowing them to turn the aircraft back to either Kuala Lumpur or Pulau Langkawi.