A B767's standby dc bus failed and displayed confusing EICAS messages with various failed component indications. The le slat disagree was the first EICAS message while the actual failed component; the standby dc bus was listed as the fifth indented EICAS message.

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Attributes
ACN	845567
Time
Date	200907
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR ZZZ
Flight Plan	IFR
Component
Aircraft Component	Electrical Distribution Busbar
Person 1
Function	Pilot Flying Captain
Person 2
Function	Pilot Not Flying First Officer
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

Descending through FL240; numerous EICAS messages occurred including standby power off and le slat disagree. Declared emergency and followed QRH procedures. Landed without incident or injury. Airport rescue and firefighting looked aircraft over. Taxied to gate.

Original NASA ASRS Text

Title: A B767's STANDBY DC BUS failed and displayed confusing EICAS messages with various failed component indications. The LE SLAT DISAGREE was the first EICAS message while the actual failed component; the STANDBY DC BUS was listed as the fifth indented EICAS message.

Narrative: Descending through FL240; numerous EICAS messages occurred including STANDBY POWER OFF and LE Slat disagree. Declared emergency and followed QRH procedures. Landed without incident or injury. Airport rescue and firefighting looked aircraft over. Taxied to gate.

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.