What was found
AFTER TAKEOFF ABOUT 600 FT AGL, PUSHER CAUTION LIGHT ILLUMINATED. FLAP CAUTION LIGHT ILLUMINATED. NR 1 RADIO INOPERATIVE & NR 2 RADIO COULD RECEIVE, BUT NOT TRANSMIT. INITIATED A PRECAUTIONARY LANDING. MLG SELECTOR PUT IN DOWN POSITION, 2 GREEN LIGHTS ON MLG, & A RED INDICATION ON NLG. MANUALLY PUMPED EMERGENCY MLG HANDLE, ALL MLG LIGHTS GREEN. DURING APPROACH, ESSENTIAL BUSS & AV BUSS CAUTION LIGHTS ILLUMINATED. CONTACTED VIA CELL PHONE & DECLARED AN EMERGENCY. HYDRAULICS, INVERTER, & WINDSHIELD HEAT CAUTION LIGHTS ILLUMINATED. BATTERY VOLTAGE AT 0. DID A LOW PASS FLYOVER & GROUND CONFIRMED NLG APPEARED TO BE DOWN & LOCKED. A NO FLAPS LANDING INITIATED, WITH NO DAMAGE TO ACFT.