B767 flight crew reported momentary loss of all instrument screens and many EICAS messages.

Attributes
ACN	1472750
Time
Date	201708
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Component
Aircraft Component	DC Rectifier
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Captain Pilot Flying
Experience	Flight Crew Total 1239.98 Flight Crew Type 1038.12
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

Narrative:

Descending we leveled off at 17000. We had a brief loss of all screens and when they returned many EICAS messages. The auto pilot disengaged as did the auto throttles; LNAV and loss of galley power and the entertainment system in back of the aircraft. We (crew) had no idea what we experienced but thought it was a momentary spurious signal.descending on base to final with everything back up and running; autopilot; auto throttles and LNAV we were cleared approach. I pushed the approach button on MCP and all screens went blank momentarily and came back. Again multiple EICAS messages followed by everything again returning to normal. The autopilot; auto throttles again were off. I immediately called for gear down on base to make sure we would get it down and hand flew to touch down and full stop; uneventful.upon taxi into chalks we noticed 5 status messages:T-right unitl engine eec C1NOSE a/G disagreair/ground disagreeaft eq exh fan 2We waited for the maintenance troops to arrive and explained the inflight events. Needed their guidance on how to make logbook write up.emergency was not declared because all systems came back.

Original NASA ASRS Text

Title: B767 flight crew reported momentary loss of all instrument screens and many EICAS messages.

Narrative: Descending we leveled off at 17000. We had a brief loss of all screens and when they returned many EICAS messages. The auto pilot disengaged as did the auto throttles; LNAV and loss of Galley power and the entertainment system in back of the aircraft. We (crew) had no idea what we experienced but thought it was a momentary spurious signal.Descending on base to final with everything back up and running; autopilot; auto throttles and LNAV we were cleared approach. I pushed the approach button on MCP and all screens went blank momentarily and came back. Again multiple EICAS messages followed by everything again returning to normal. The autopilot; auto throttles again were off. I immediately called for gear down on base to make sure we would get it down and hand flew to touch down and full stop; uneventful.Upon taxi into chalks we noticed 5 Status messages:T-R UNITL ENG EEC C1NOSE A/G DISAGREAIR/GND DISAGREEAFT EQ EXH FAN 2We waited for the maintenance troops to arrive and explained the inflight events. Needed their guidance on how to make Logbook write up.Emergency was not declared because all systems came back.

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.