Narrative:

[I] departed on an IFR flight plan in VFR conditions normally. Upon handoff from ARTCC to approach while climbing through class B airspace; the primary GPS momentarily shutdown; then the communications radio became intermittent. While observing these two issues; the remaining avionics system shutdown and the airplane lost all electrical power. The engine operated normally. The weather was VMC in class B airspace; thus I determined to exit class B and return to my departure airport. The time required for descent and return allowed for execution of emergency checklists in an unhurried manner. These were accomplished without issue. The procedures did not resolve the electrical malfunction; but did get the gear manually extended. Circling east of my destination allowed for completion of the checklists and entry into the traffic pattern downwind leg. I thought I saw a green light from the tower upon entry into the pattern; but could not be sure. Executed a normal approach and landing with no flaps and no safe gear indication (visual confirmation of gear down; locked status unknown). Touched down with power on the left gear (upwind) initially testing its security; then the same with the right gear. After testing the security of the mains; I slowly lowered the nose gear to the runway and after contact reduced power. Upon exiting on the taxiway; observed a green light from the tower and continued to taxi to parking. Upon shutdown I contacted tower on the land-line and explained the problem. VMC conditions permitted great latitude in options. IFR flight planning aided in communicating with the ATC entities alerting them to a problem. This airport has ample runway to allow a very controlled landing in a C210.

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Original NASA ASRS Text

Title: A C210 lost all electrical power during the climb after takeoff in Class B airspace and returned to his nearby departure airport.

Narrative: [I] departed on an IFR flight plan in VFR conditions normally. Upon handoff from ARTCC to Approach while climbing through class B airspace; the primary GPS momentarily shutdown; then the communications radio became intermittent. While observing these two issues; the remaining avionics system shutdown and the airplane lost all electrical power. The engine operated normally. The weather was VMC in Class B airspace; thus I determined to exit Class B and return to my departure airport. The time required for descent and return allowed for execution of emergency checklists in an unhurried manner. These were accomplished without issue. The procedures did not resolve the electrical malfunction; but did get the gear manually extended. Circling east of my destination allowed for completion of the checklists and entry into the traffic pattern downwind leg. I thought I saw a green light from the Tower upon entry into the pattern; but could not be sure. Executed a normal approach and landing with no flaps and no safe gear indication (visual confirmation of gear down; locked status unknown). Touched down with power on the left gear (upwind) initially testing its security; then the same with the right gear. After testing the security of the mains; I slowly lowered the nose gear to the runway and after contact reduced power. Upon exiting on the taxiway; observed a green light from the Tower and continued to taxi to parking. Upon shutdown I contacted Tower on the land-line and explained the problem. VMC conditions permitted great latitude in options. IFR flight planning aided in communicating with the ATC entities alerting them to a problem. This airport has ample runway to allow a very controlled landing in a C210.

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.