What was found
ON DESCENT, AFT F/A JUMPSEAT RIDER REPORTS HYD ODOR IN REAR OF ACFT. NOTHING UNUSUAL IN FLIGHT DECK. COMPLETED CABIN ODOR REPORT. MX ACCOMPLISHED JOB CARD 26L00021001 (T/S CABIN ODOR). FOUND 2579GM PARKING BRAKE VALVE LOWER FITTING LEAKING HYD FLUID. R & R PARKING BRAKE VALVE 2579M IAW AMM 32-45-14-400-001A. CLEANED AND WIPED DOWN ACFT BELLY TO REMOVE EXCESS CONTAMINANTS IAW AMM 12-21-11. ALSO, FOUND AFT AIR BOX DIFFUSER SEAL NOT SEATED AND IN BAD SHAPE. REPLACED BOTH FWD AND AFT APU DIFFUSER SEALS IAW AMM 49-16. RAN BOTH ENGINES AND APU. NO ODORS PRESENT ACCOMPLISHED BURN-OUT OF APU DUCT USING BLASTER TOOL. EXAMINED BEHIND LT AND RT ENGINE SPINNERS FOR OIL. NONE NOTED.