B757-200
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 150; Flight Crew Total 12500; Flight Crew Type 757
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Landed in Emergency Condition; Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport
Aircraft
Total failure of both cabin auto controllers resulting in loss of cabin pressure at a cruise altitude of 38;000 ft. As the aircraft was climbing through 37;500 ft going to a cruise altitude of FL380 we experienced a total failure of both cabin auto controllers. This was accompanied by the cabin altitude warning EICAS and buzzer and both cabin auto 1 and 2 controllers EICAS warning messages. We both looked at the cabin and it was climbing through around 13;000 ft. We both immediately got on O2 with the mask at 100% and emergency. Once going on O2 we [advised] ATC and diverted while descending the aircraft to a safe attitude of 9000 ft and going through the appropriate checklist. Aircraft was diverted and landed back safely. Very scary event since it was very insidious and snuck up on us quickly with no notice until the cabin attitude warning went off.
[Report narrative contained no additional information.]
B757-200 flight crew reported losing all cabin pressure while in cruise.