What was found
DIRTY SOCK/OIL ODOR IN FLT DECK AFTER GEARDOWN ON FINAL APPROACH. PERFORM AMM 05-50-00-810-831-A IDENTIFICATION OF THE CAUSE FOR CABIN ODOR, SMOKE OR FUME, AND TSM TASK 71-00-00-810-801-A SMOKE AND/OR OIL SMELL IN THE CABIN DUE TO AN ENGINE LEAKAGE. ACCOMPLISHED TSM 05-50-00-810-831-A, FOUND THROTTLE VALVE LEAKING HYD FLUID. ACCOMPLISHED TSM 71-00-00-810-801-A ON ENG 1 & 2 WITH NO DIRTY SOCK/ OIL SMELL AT VARIOUS POWER SETTINGS WITH ENGINES SUPPLING RESPECTIVE BLEEDS. NO ODOR PRESENT DURING OR AFTER RUNS.