The a and B phases of a DHC8-100s right 115 vac bus failed in flight causing the loss of multiple c...

Attributes
ACN	823370
Time
Date	200902
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	Cruise
Flight Plan	IFR
Component
Aircraft Component	Electrical Distribution Busbar
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Commercial
Experience	Flight Crew Last 90 Days 280 Flight Crew Total 2500 Flight Crew Type 1000
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

On the cruise climb between 15;000 ft and 17;000 ft MSL; the captain (pilot flying) cycled the #2 fuel auxiliary pump. This caused the right tru circuit breaker to pop and tru caution light to illuminate. It also caused the right stall warning and right elevator horn heat caution lights to illuminate. Performed the appropriate checklist procedures. We determined that the a and B phase of our right 115VAC bus had failed. Right engine intake heater; right propeller heater; right fuel auxiliary pump and right distributor valve for deice boots had also failed. As a precaution; we ran the right 115VAC bus failure checklist. We found that all these failures were connected to the right 115VAC bus. We declared an emergency to ask for an altitude clear of ice. Informed company and flight attendant of situation and continued to ZZZ. We did not divert because ZZZ was reporting mostly clear sky; no ice and warmer temperature. We landed in ZZZ with no further event.

Original NASA ASRS Text

Title: The A and B phases of a DHC8-100s right 115 VAC bus failed in flight causing the loss of multiple components. An emergency was declared and the flight continued to the destination at a lower altitude free of icing conditions.

Narrative: On the cruise climb between 15;000 FT and 17;000 FT MSL; the Captain (Pilot Flying) cycled the #2 fuel auxiliary pump. This caused the right TRU CB to pop and TRU Caution light to illuminate. It also caused the Right Stall Warning and Right Elevator Horn Heat Caution lights to illuminate. Performed the appropriate checklist procedures. We determined that the A and B phase of our right 115VAC bus had failed. Right engine intake heater; right PROP heater; right fuel auxiliary pump and right distributor valve for deice boots had also failed. As a precaution; we ran the right 115VAC Bus Failure checklist. We found that all these failures were connected to the right 115VAC bus. We declared an emergency to ask for an altitude clear of ice. Informed company and Flight Attendant of situation and continued to ZZZ. We did not divert because ZZZ was reporting mostly clear sky; no ice and warmer temperature. We landed in ZZZ with no further event.

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.

The a and B phases of a DHC8-100s right 115 vac bus failed in flight causing the loss of multiple components. An emergency was declared and the flight continued to the destination at a lower altitude free of icing conditions.

The a and B phases of a DHC8-100s right 115 vac bus failed in flight causing the loss of multiple components. An emergency was declared and the flight continued to the destination at a lower altitude free of icing conditions.