What was found
RETURNED & ACFT WAS GNDED. GEAR NOT DOWN BELL & WARNING AFTER TAKEOFF, GPWS RED WARNING GEAR NOT DOWN WARNING WITH GEAR UP, PULL UP & TERRAIN WARNING CONTINUOUS. REPLACED NR 2 RADIO ALTIMETER ANTENNAS IAW 34-42-11, BITE CHECK OK. REPLACED NR 1 & 2 RADIO ALTIMETER TRANSCEIVERS IAW 34-42-33, BITE TEST OK. PERFORMED LGCIU NR 1 & 2 BITE, NO FAULTS NOTED IAW 32-69-00-501. PERFORMED GPWS BITE NO FAULTS NOTED. SEE AALA 201603149018 & AALA 201603149019 FOR ADDITIONAL PARTS.