As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING SERVICING OF THE LT ENGINE OIL, THE OIL LEVEL INDICATOR FLOAT FELL INTO THE FILLER NECK. THE SIGHT GLASS ASSY WAS REMOVED AND THE RETAINING TABS WERE FOUND TO BE NOT FULLY SECURED. TABS WERE BACK INTO PLACE AND SIGHT GLASS REISTALLED IAW AMM.