What was found
AIRCRAFT WAS GROUNDED: SOF EVENT, TO BE ACCOMPLISHED BEFORE FURTHER FLIGHT,DUE TO PIREP 1608215, POSSIBLE CABIN ODOR ON DESCENT AND TAXI IN". FOUND SOURCE OF ODOR CAUSED BY LEAKING SELECTOR VALVE 2576GM REF MIC # 1609035. MAINTENANCE REPLACED UPPER OUTBOARD LEFT UNIONS AND O-RINGS ON AUTOBRAKE SELECTOR VALVE IAW AMM 32-42-13