PRIMARY LOSS OF ELECTRICAL PWR CREATES NEED FOR AN EMER GEAR PROC. ACFT EQUIP PROBLEM CREATES RADIO COM PROBLEM UNABLE TO ESTABLISH RADIO CONTACT.

Narrative

DID NORMAL RUN UP IN TWIN; ALL SYS CHKED NORMAL. I WAS R SEAT IN THE CAPACITY AS SAFETY PLT; WHEN WE TOOK OFF FROM MMU. EVERYTHING SEEMED NORMAL UNTIL I PUT THE GEAR SWITCH IN THE UP POS. AT THAT TIME I INFORMED THE OWNER THE NAV COM RADIOS WERE FADING OUT. APPROX A MIN LATER WE LOST ALL ELECTRICAL PWR. WE THEN L THE ATA TO TRY TO DETERMINE WHAT THE PROBLEM WAS. THE OWNER OF THE AIRPLANE WENT THROUGH THE PROCS TO REGAIN THE ELECTRICAL PWR; WITHOUT SUCCESS. AT THAT TIME WE DECIDED A MANUAL GEAR EXTENSION WAS REQUIRED. WE DID HAVE A HANDHELD RADIO AND WE WERE ABLE TO CONTACT A FRIEND IN ANOTHER AIRPLANE AND HE CONTACTED MMU TWR TO ADVISE THEM OF THE SITUATION. HE ALSO TOLD THEM WE WERE INBOUND WITH AN ELECTRICAL/GEAR PROBLEM. WE COULD ONLY HEAR THE TWR; NOT TALK TO THEM. IN THE PATTERN THE TWR ASKED US IF WE WANTED A FLY BY; WE WAVED OUR WINGS WHICH INDICATED A YES. THE TWR TOLD US THE GEAR WAS ONLY PARTIALLY DOWN. SO THE OWNER TRIED THE MANUAL GEAR EXTENSION AGAIN WITH SUCCESS. WE DID ANOTHER FLY BY AND THE TWR SAID THE GEAR APPEARED TO BE DOWN. WE THEN LANDED SAFELY.