What was found
PREFLIGHT CABIN PAC HAS STRONG VERY STRONG, DIRTY SOCK/OIL ODOR WHEN APU RUNNING. RAN APU CABIN AND COCKPIT BOTH HAD A ODOR OF DIRTY SOCKS ESPECIALLY CABIN , (APU RUNNING ONLY) LOOKED DOWN INLET OF APU, FOUND OIL AROUND INNER AND INLET SECONDARY SCREEN. REMOVED COALESCERS CABIN AND COCKPIT, HAD FILM OF OIL ON BOWLS IAW MM 12-10-01 REV. 37. GAINED ACCESS TO TO INLET FOR BOROSCOPE IAW AMCC. BOROSCOPED APU INLET FOUND BLADE DAMAGE AND OIL STREAKS DOWN BLADES. REMOVED, CLEANED AND RE-INSTALLED COALESCER SOCKS IAW MM 12-10-01 (REV 35). REMOVED APU IAW MM 49-10-00 REV 20 BUILT UP AND INSTALLED CUSTOMER SUPPLIED APU REF MM ON 49-10-00. REV 25. SERVICED APU WITH 1 3/4 QTS MOBILE JET II. LEAK AND OPS CHECK APU OPS AND LEAK CHECK GOOD. ORIGNAL APU TIME 8552.0 ORIGNAL APU CYCLES 8428.0