B737-800
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Inflight Event / Encounter Weather / Turbulence
Flight Crew Diverted; Flight Crew Landed As Precaution
Aircraft; Weather
During cruise flight at FL380 while passing north of a thunderstorm; FMC SAT temperatures went from -51* to -44* to -28*. We noticed ice building on windshield wipers and turned Engine Ant-ice on and asked for a lower altitude seeking a smoother ride. A FL360 descent was granted approximately 4 minutes later. As the descent was begun a right Bleed Trip Off light illuminated and the cabin rate indicator showed a steady climb rate. While referencing the QRH Bleed Trip Off procedure the Left Bleed Trip occurred and the cabin altitude warning began. We started an emergency descent to 10;000 feet with 02 mask on and successfully restored the packs by pushing the Trip Reset switch. Since a higher than normal fuel burn occurred at a lower altitude; a diversion was commenced.
[Report Narrative Contained No Additional Information].
B737-800 flight crew experiences a dual bleed trip during a descent to FL360 causing a loss of cabin pressurization. Pressurization is regained during the descent but the crew elects to divert to a suitable airport.