What was found
CMH - FLT 4975 - LAVATORY SMOKE INDICATION CAME ON DURING TRANSITION FROM APU BLEED TO ENGINE BLEED. POSSIBLE ENGINE OIL LEAK. (M)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CMH - FLT 4975 - LAVATORY SMOKE INDICATION CAME ON DURING TRANSITION FROM APU BLEED TO ENGINE BLEED. POSSIBLE ENGINE OIL LEAK. (M)