At FL430; owner of a giii hit his head on an electrical gang bar in the cockpit causing loss of elec...

Attributes
ACN	1133196
Time
Date	201311
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Aircraft 1
Make Model Name	Gulfstream III (G1159A)
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Electrical Power
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Flight Instructor Flight Crew Instrument
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 16000 Flight Crew Type 225
Person 2
Function	Pilot Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 188 Flight Crew Total 19100 Flight Crew Type 1400
Events
Anomaly	Aircraft Equipment Problem Critical Flight Deck / Cabin / Aircraft Event Other / Unknown

Narrative:

We were flying at FL430 when the flight attendant notified crew that there was a flood in the lavatory. Captain went back to investigate while first officer flew aircraft. Owner went up to flight deck and hit his head on emergency electrical gang bar in cockpit. All electrical power was lost and cabin began depressurization. Captain returned to flight deck and tried to reset electrical power and began emergency descent. We could not notify [center] of our descent because our radios were inoperative due to electrical power unable to restore. Passengers and flight crew all donned O2 masks except owner; who passed out due to hypoxia. Captain was finally able to restore electrical power at 16;000 ft. First officer was now able to contact...center and advise of the situation. We were able to then land. In the future no one except flight crew is allowed to enter flight deck during flight; not even aircraft owner. One good thing that happened was that both pilots had ipads. We were able to still navigate even though aircraft lost electrical power. The irs and navigation boxes were not able to power up for the rest of the short flight.

Original NASA ASRS Text

Title: At FL430; owner of a GIII hit his head on an electrical gang bar in the cockpit causing loss of electrical power and cabin decompression. Electrical power restored at 16;000 FT and aircraft landed without further incident.

Narrative: We were flying at FL430 when the Flight Attendant notified crew that there was a flood in the lavatory. Captain went back to investigate while First Officer flew aircraft. Owner went up to flight deck and hit his head on emergency electrical gang bar in cockpit. All electrical power was lost and cabin began depressurization. Captain returned to flight deck and tried to reset electrical power and began emergency descent. We could not notify [Center] of our descent because our radios were inoperative due to electrical power unable to restore. Passengers and flight crew all donned O2 masks except owner; who passed out due to hypoxia. Captain was finally able to restore electrical power at 16;000 FT. First Officer was now able to contact...Center and advise of the situation. We were able to then land. In the future no one except flight crew is allowed to enter flight deck during flight; not even aircraft owner. One good thing that happened was that both pilots had iPads. We were able to still navigate even though aircraft lost electrical power. The IRs and navigation boxes were not able to power up for the rest of the short flight.

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.

At FL430; owner of a giii hit his head on an electrical gang bar in the cockpit causing loss of electrical power and cabin decompression. Electrical power restored at 16;000 ft and aircraft landed without further incident.