A BE200's electrical system failed after takeoff so; unable to communicate; the flight continued VFR...

Narrative:

I was giving a new king air instructor pilot a standardization check ride. Our mission was to conduct a standardization ride in our king air C-90 then deliver it to a nearby airport; then pick up a king air 200; do a standardization flight then return to our home airport. Shortly after takeoff from with the new aircraft on our second leg both generators tripped off line and would not reset. We could see that the landing gear was not up and the flaps had not retracted from the 1/2 down position. The radios; navigation gear and all engines and captain's flight instruments had failed. The aircraft battery showed about 10-12 volts (instead of 24). I set the transponders to 7700 and was getting a reply light. The landing gear were in an unknown position. We were closer to our departure airport than to our home base; but I decided I'd rather land at an airport that has firefighting equipment so we continued east to our home base. We continued troubleshooting to get the generators to reset to no avail. Finally we arrived over our destination at 2;500 ft to observe the direction of landing. We then made 3 passes by the tower; rocking our wings and looking for a green light; both to clear the runway for landing and to get some indication that our landing gear; which we had manually pumped down; was down. Finally we landed on the runway with no further incident. The FBO is investigating the cause of the double generator failure.

Original NASA ASRS Text

Title: A BE200's electrical system failed after takeoff so; unable to communicate; the flight continued VFR to its filed destination where CFR equipment was available.

Narrative: I was giving a new King Air Instructor pilot a standardization check ride. Our mission was to conduct a standardization ride in our King Air C-90 then deliver it to a nearby airport; then pick up a King Air 200; do a standardization flight then return to our home airport. Shortly after takeoff from with the new aircraft on our second leg both generators tripped off line and would not reset. We could see that the landing gear was not up and the flaps had not retracted from the 1/2 down position. The radios; navigation gear and all engines and Captain's flight instruments had failed. The aircraft battery showed about 10-12 volts (instead of 24). I set the transponders to 7700 and was getting a reply light. The landing gear were in an unknown position. We were closer to our departure airport than to our home base; but I decided I'd rather land at an airport that has firefighting equipment so we continued east to our home base. We continued troubleshooting to get the generators to reset to no avail. Finally we arrived over our destination at 2;500 FT to observe the direction of landing. We then made 3 passes by the Tower; rocking our wings and looking for a green light; both to clear the runway for landing and to get some indication that our landing gear; which we had manually pumped down; was down. Finally we landed on the runway with no further incident. The FBO is investigating the cause of the double generator failure.

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.

Attributes
ACN	979495
Time
Date	201111
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Super King Air 200
Operating Under FAR Part	Part 91
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Electrical Power
Person 1
Function	Instructor
Qualification	Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP) Flight Crew Commercial Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 95 Flight Crew Total 25744 Flight Crew Type 3300
Events
Anomaly	Aircraft Equipment Problem Critical

A BE200's electrical system failed after takeoff so; unable to communicate; the flight continued VFR to its filed destination where crash fire rescue equipment equipment was available.