What was found
WHEN POWER CAME BACK AT TOP OF DESCENT A SHARP PUNGENT SMELL FILLED THE FLIGHT DECK AND REMAINED THRU SHUTDOWN. MAINTENANCE INSPECTED APU AND FOUND INTAKE ASSEMBLY WITH OILY RESIDUE. REMOVED RIGHT APU DOOR FOR CLEANING AND FOUND NR 1 ENGINE FORWARD SUMP PRESSURIZATION TUBE LEAKING OIL. REQUIRES ENGINE CHANGE. COMPLIED WITH NR 1 ENGINE CHANGE ON 7900-2001 AND 4916-2001. INSTALLED RIGHT APU DOOR. FOUND RIGHT PACK PLENUM DELAMINATED. REMOVED AND REPLACED SAME. LEAK AND OPERATIONS CHECK GOOD.