<< >> NASA ASRS Report 1066919, February 2013

A dhc-8-100 left AC bus failed after takeoff in heavy snow; so an emergency was declared and the flight returned to the departure airport.

Attributes
ACN	1066919
Time
Date	201302
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	Dash 8-100
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Electrical Distribution Busbar
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 120 Flight Crew Total 20000 Flight Crew Type 10000
Person 2
Function	First Officer Pilot Flying
Qualification	Flight Crew Commercial
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Maintenance Inflight Event / Encounter Weather / Turbulence

Narrative:

8;000 feet in heavy snow after departing; -7C; we noticed the caution light panel lt tru; left AC bus; left elevator heat and stall warn lights illuminated. Based on flight conditions and aircraft condition; degraded deice capability; an emergency was declared and returned to the departure airport. Completed applicable checklists notified company; flight attendant and passengers of our return; special cabin instructions were not required. Our flight attendant called the cockpit around the time we noticed the light panel to alert us the emergency lights were flashing. A landing was uneventful; no assistance was required. Uneventful taxi to gate with normal shut down procedures.

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Original NASA ASRS Text

Title: A DHC-8-100 L AC Bus failed after takeoff in heavy snow; so an emergency was declared and the flight returned to the departure airport.

Narrative: 8;000 feet in heavy snow after departing; -7C; we noticed the Caution Light panel LT TRU; L AC Bus; L Elevator Heat and Stall Warn lights illuminated. Based on flight conditions and aircraft condition; degraded deice capability; an emergency was declared and returned to the departure airport. Completed applicable checklists notified Company; Flight Attendant and passengers of our return; special cabin instructions were not required. Our Flight Attendant called the cockpit around the time we noticed the light panel to alert us the emergency lights were flashing. A landing was uneventful; no assistance was required. Uneventful taxi to gate with normal shut down procedures.

Data retrieved from NASA's ASRS site as of July 2013 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.