What was found
A- FLIGHT ATTENDANT COMPLAINED ABOUT AN ODOR IN THE FWD GALLEY AT THE GATE. IAW TSM 05-50-00-810-831-A, TROUBLESHOT AND FOUND MOST PROBABLE CAUSE OF CABIN ODOR IS OVER SERVICE IAW TSM 05-50-00-810-086-A. CONTINUED TROUBLESHOOTING IAW TSM 05-50-00-810-831-A. FOUND APU OIL OVERSERVICED AND CORRECTED TO PROPER LEVEL. COMPLIED WITH TSM 49-00-81-810-874-A AND AMM 12-33-21-618-001-A02, NO ODORS DETECTED. NO OIL LEAKS IN APU AREA. AIRCRAFT OK FOR CONTINUED SERVICE.