Narrative:

During cruise the dc distribution bus 1 breaker no.1 popped. This caused the loss of the c autopilot; LNAV and VNAV. We had a number of caution and status messages; all appeared to be not related in any specific way. I flew the aircraft as the captain contacted maintenance. We found the breaker out and the first officer ipad ram mount in the vicinity of the breaker. We suspect that the mount was pushed against the breaker causing it to pop. The breaker was reset after maintenance consult. All systems returned except no 1 engine eec which remained in the altn mode. There is no specific place or sop location to stow an unused ram mount.

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Original NASA ASRS Text

Title: B747 flight crew experiences failure of the DC Distribution bus 1 in cruise. After contacting Maintenance Control it is discovered that a circuit breaker had tripped and was likely caused by the iPad ram mount; on the floor; hitting it. The circuit breaker is reset.

Narrative: During cruise the DC distribution bus 1 breaker no.1 popped. This caused the loss of the c autopilot; LNAV and VNAV. We had a number of caution and status messages; all appeared to be not related in any specific way. I flew the aircraft as the Captain contacted maintenance. We found the breaker out and the First Officer iPad RAM mount in the vicinity of the breaker. We suspect that the mount was pushed against the breaker causing it to pop. The breaker was reset after maintenance consult. All systems returned except no 1 engine EEC which remained in the altn mode. There is no specific place or sop location to stow an unused ram mount.

Data retrieved from NASA's ASRS site 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.