What was found
RESIDUAL SMOKE/OIL FROM APU MAINTENANCE SET OFF AFT LAV SMOKE DETECTORS SHORTLY AFTER T/O. SOUNDED FOR 30 SECONDS THEN WENT OUT. LANDING WEIGHT APROXIMATELY 100,000 LBS, NEEDS INSPECTION. REMOVED AND REPLACED COALESCER BAGS ON RT AND LT PACKS IAW 21-00, OPS CHECKED GOOD. NO SMELL OF OIL OR SMOKE. C/W OVERWEIGHT LANDING INSPECTION PER W/C 0022B SHEET A, NO DEFECTS NOTED AT THIS TIME.