As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT MAIN TIRE LOSING AIR PRESSURE, 20-30 PSI OVERNIGHT. FOUND CRACK IN OUTER SURFACE OF INNER HALF OF WHEEL. CRACK IS APPROX. 1 1/4" RUNNING ALONG RADIUS OF WHEEL APPROX. 1/4" OUTBOARD OF A BOLT HOLE, BUT NOT CONNECTING TO HOLE. UNABLE TO SEE CRACK ON INNER SIDE OF THIS WHEEL HALF.