What was found
ON TAKOFF ROLL DUAL NR 1 BLEED HOT AND NR 2 BLEED HOT CAUTION MESSAGE. ACCOMPLISHED CHECKLIST LIGHTS EXTINGUISHED. RETURNED TO FIELD AND ACCOMPLISHED A UNEVENTFUL LANDING. R & R NR 1 & NR 2 ENGINE BLEED OVERTEMP SWITCHES IAW AMM TASKS 36-11-16-000-801/400-801. PERFORMED OPS TEST OF BLEED AIR SYS IAW AMM TASK NR36-11-00-710-802. OPS TESTS GOOD. NR 1 & NR 2 BLEED HOT CAUTION LIGHTS REMAINED EXTINGUISHED. NO FURTHER DEFECTS NOTED. WORK PERFORMED DUE TO CDS FAULT 1301-LHPBLSW. FAULT DID NOT REOCCUR. DUE TO CDS FAULT 1006 RNAPRSOV R & R NR 2 ENG NACELLE SHUTOFF VALVE IAW AMM TASK 36-11-19-000-801/400-801 OPS TESTS GOOD. AS PRECAUTIONARY MEASURE R & R NR 1 AND NR 2 ENG HPSOV FILTERS IAW AMM 36-11-09-000-802/400-802 AND NR 1 ENG NPRSOV FILTER IAW AMM 36-11-19-000-802/400-802. OPS TEST OF VALVE AND FILTERS PERFORMED IAW SUBTASK 36-11-19-710-001, OPS TEST GOOD. RETURNED TO SERVICE.