Narrative:

We were moving a gulfstream aircraft. We lost radio's and started losing alternators; battery lights were coming on; we squawked 7700 and then 7600 and tried to talk to tower on our number 3 radio; we could hear them but they couldn't here us. We were getting into an emergency situation; so we stayed at 4;500 ft and went out over the ocean to come in to land at a nearby airport. When we entered downwind for the left runway the tower could hear us on our back up emergency radio. We landed without incident and taxied in to the FBO. Tower notified us to call center by phone and I did. They said that I entered class B and class C airspace and said I entered without radio; I could hear them; but they could not hear us on the radio. So the safest thing we could do is to land at a nearby airport.

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Original NASA ASRS Text

Title: A Gulfstream on a ferry flight suffered a loss of AC electrical power and normal communications. The crew diverted to another airport and landed utilizing a backup communication radio.

Narrative: We were moving a Gulfstream aircraft. We lost radio's and started losing alternators; battery lights were coming on; we squawked 7700 and then 7600 and tried to talk to Tower on our number 3 radio; we could hear them but they couldn't here us. We were getting into an emergency situation; so we stayed at 4;500 FT and went out over the ocean to come in to land at a nearby airport. When we entered downwind for the left runway the Tower could hear us on our back up emergency radio. We landed without incident and taxied in to the FBO. Tower notified us to call Center by phone and I did. They said that I entered Class B and Class C airspace and said I entered without radio; I could hear them; but they could not hear us on the radio. So the safest thing we could do is to land at a nearby airport.

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.