What was found
SEA - AFTER TAKEOFF NR 1 BLEED HOT AND NR 2 BLEED HOT ILLUMINATED SIMULTANEOUSLY. BOTH LIGHTS EXTINGUISHED AFTER BLEED SWITCHES CYCLED PER EMERGENCY/ABNORMAL CHECKLIST. RETURNED TO FIELD. LANDING UNEVENTFUL. INTERROGATED CDS, FOUND CODES 7005, 7001 ON BOTH ENG. REMOVED AND REPLACED BLEED OVERTEMP SWITCH AND NACELLE DUCT-LEAK OVERTEMP SWITCH ON BOTH NR 1 AND NR 2 ENG IAW AMM TASKS 36-11-21-000-801, 36-11-21-400-801, 36-11-16-000-801, 36-11-16-400-801. APPLIED HEAT SHRINK AS REQ. ALSO REMOVED AND REPLACED HPSOV VALVE ON NR 1 ENG IAW AMM TASKS 36-11-09-000-801, 36-11-09-400-801. GROUND RAN BOTH ENGINES ASSOCIATED CAUTION LIGHTS DID NOT RETURN, NO FAULTS IN CDS. OPS CHECK GOOD. NO OTHER DEFECTS NOTED. RETURNED TO SERVICE.