What was found
BLEED 1 LEAK AFTER TAKEOFF. AFTER RUNNING QRH, MESSAGE WENT AWAY. ON AFTER LANDING WHILE USING THE APU BLEED, BLEED 1 LEAK MESSAGE RETURNED. DECLARED EMERGENCY, RETURNED TO FIELD, LANDED WITHOUT INCIDENT. FOUND LOOSE CLAMPS ON TEMP CONTROL UCU. REPAIR AS NEEDED AND PERFORMED AN ENGINE RUN AND APU ACFT PACKS, NO BLEED LEAKS NOTED AT THIS TIME IN REF WITH 21-00-00 AND 21-60-01.