Narrative:

During climb we received a miscellaneous alert single land; with no other malfunctions indicated. Once level at fl 320 we received a hydraulic 3 pres lo followed by a hydraulic 3 off alert. Multiple malfunctions; including hydraulic system 3 isol; yaw damp upr B;yaw damp lwr B; avionics fan ovrd; engine 3 fadec fault; FCC 2A data fault; FCC 2B data fault; then appeared. We also received multiple aural tire failure alerts. Autopilots were not available; so first officer assumed the flying duties and descended to fl 280 while I accomplished checklists and attempted to troubleshoot with the 2 md-11 qualified jump seating crew members. Electrical synoptic appeared normal and no resolution to the problems was obvious; however aircraft handling was normal. I contacted maintenance and dispatch via satcom and I decided to declare an emergency and return to our departure airport. We dumped approximately 9000 lbs. Of fuel and we landed uneventfully.

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Original NASA ASRS Text

Title: Two remote circuit breakers popped in a MD11's electronics compartment inaccessible to the crew. Multiple disparate components were inoperative confusing the crew about the malfunction's origin. An emergency was declared followed by a return to land.

Narrative: During climb we received a miscellaneous alert SINGLE LAND; with no other malfunctions indicated. Once level at FL 320 we received a HYD 3 PRES LO followed by a HYD 3 OFF alert. Multiple malfunctions; including HYD SYS 3 ISOL; YAW DAMP UPR B;YAW DAMP LWR B; AVIONICS FAN OVRD; ENG 3 FADEC FAULT; FCC 2A DATA FAULT; FCC 2B DATA FAULT; then appeared. We also received multiple aural Tire Failure alerts. Autopilots were not available; so First Officer assumed the flying duties and descended to FL 280 while I accomplished checklists and attempted to troubleshoot with the 2 MD-11 qualified jump seating crew members. Electrical synoptic appeared normal and no resolution to the problems was obvious; however aircraft handling was normal. I contacted Maintenance and Dispatch via SATCOM and I decided to declare an emergency and return to our departure airport. We dumped approximately 9000 lbs. of fuel and we landed uneventfully.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.