What was found
(CAN) - PIPER AIRCRAFT SETTLED LOWER TO LEFT SIDE ON LANDING. INITIAL INSPECTION REVEALED FLAT LEFT MAIN OLEO & EVIDENCE OF HYDRAULIC FLUID LEAK ON LEFT GEAR AND UNDER LEFT WING. FURTHER INSPECTION REVEALED AN APPROX 6 INCH CRACK ON AFT/BOTTOM SIDE OFUPPER GEAR TRUNNION. ADDITIONAL INFO: PART AFFECTED HAS 5638 HRS PREVIOUS TAKEOFF. LANDINGS OF THE DAY WERE REPORTED NORMAL. AIRCRAFT OPERATES WITH INCREASED TAKEOFF WEIGHT OF 7368 LBS IN ACCORDANCE WITH BOUNDARY LAYER RESEARCH VORTEX GENERATOR KIT STC # SA00192SE, INSTALLED APRIL 1995.