What was found
F/A REPORTS STRONG CHEMICAL ODOR. PACK TEMP WAS 40 DEGREE C. SELECTED FULL COLD ON PACKS SMELL DISIPATED. AS TEMPS INCREASED ODOR INCREASED BUT WAS LESS PRONOUNCED. ON ARRIVAL NO ODORS DETECTED. PERFORMED GVI IN BOTH ENGINE NACELLES AND THE APU COMPARTMENT WITH NO DEFECTS NOTED. COMPLIED WITH MCN NR 62172-01 AND AMM TASK 21-00-00-160-801. NO ODORS DETECTED. FOUND FAULT CODE 1104 L-HPSOV IN CDS AND NO AIRFLOW WITH NR 1 BLEED ON AND NO RISE IN ITT. R & R THE LT HPSOV IAW AMM TASKS 36-11-09-000-801 & 36-11-09-400-801. PERFORMED OPS TEST OF THE BLEED AIR SYS IAW AMM TASK 36-11-00-710-801. OPS TESTS GOOD. NO ODORS DETECTED. NO FURTHER DEFECTS NOTED. RETURNED TO SERVICE.