What was found
STRONG GROSS SMELLING ODOR APPEARED ON TAKEOFF OUT OF SAN. THE ODOR WAS IN THE ENTIRE PLANE. PASSENGERS SMELLED IT AS WELL. IT DISSIPATED AT CRUISE AND THE RETURNED ON DESCENT AND LAND. AFTER LANDING IT DISSIPATED AGAIN. PERFORMED TROUBLESHOOTING OF ABNORMAL SMELL THROUGH ENTIRE ACFT IN REF TO FIM TASK 21-20-00-810-801-A. NO EVIDENCE OF BURNT ELECTRICAL COMPONENTS IN COCKPIT, CABIN, GALLEY, OR LAV AREAS. APU AND ENG NORMAL STARTS WITH NO ABNORMAL SMELL FOUND. PERFORMED GVI OF ENGINE AIR INLETS, APU INLET, & PACK AIR INLETS; NO FAULTS FOUND. NO EVIDENCE OF DE-ICING FLUID CONTAMINATION FOUND. NO RECENT HISTORY OF COMPRESSOR WASH. PERFORMED OPS CHECK OF AC PACK 1 & 2 INDIVIDUALLY AT COLDEST AND HOTTEST TEMP SETTINGS WITH APU & ENGINE BLEED SYS; NO FAULTS FOUND. COULD NOT DUPLICATE FAULT ON GROUND. PERFORMED TROUBLESHOOTING OF ABNORMAL SMELL THROUGH ENTIRE ACFT IAW FIM 21-20-00-810-801-A. NO EVIDENCE OF BURNT ELECTRICAL COMPONENTS IN COCKPIT, CABIN, GALLEY, OR LAV AREAS. APU AND ENGINE NORMAL STARTS WITH NO ABNORMAL SMELL FOUND. PERFORMED GVI OF ENGINE AIR INLETS, APU INLET, AND PACK AIR INLETS; NO FAULTS FOUND. NO EVIDENCE OF DE-ICING FLUID CONTAMINATION FOUND. NO RECENT HISTORY OF COMPRESSOR WASH. PERFORMED OPS CHECK OF AC PACK 1 AND 2 INDIVIDUALLY AT COLDEST AND HOTTEST TEMP SETTINGS WITH APU AND ENGINE BLEED SYS; NO FAULTS FOUND. COULD NOT DUPLICATE FAULT ON GROUND. MCI CREATED FOR FURTHER TROUBLESHOOTING. MAR 11, 2026 STATION: SLC -- INSTALLED OZINATOR ONTO AIRCRAFT WITH RECIRC FANS RUNNING AND ALLOWED OZONE TO PERMIATE AIRCRAFT FOR 3 HOURS. REMOVED OZINATOR FROM AIRCRAFT. AFTER OZONE HAD DISAPATED PERFORMED PRESSURIZATION OF AIRCRAFT USING ENGINES AS BLEED SOURCE IN REFERENCE TO AMM 21-31-00. NO ABNORMAL SMELLS NOTED DURING CABIN ALTITUDE DECENT O