As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENGINE OIL LOW QUANTITY AT FL410. INITIALLY 17% THEN TO 0% IN DIVERSION TO DAL AFTER 20 MINUTES BOX FLASHED RED. THEN SHUT DOWN ENGINE. DEPARTED DEN WITH 88%<[01] FOUND STARTER QUAD RING CLAMP BROKEN AND STARTER DISLODGED FROM ACCESSORY GEAR BOX. R&R STARTER AND CLAMP PER AMM 80-11-01 SERVICED ENG OIL PER AMM 12-31-11. FDR DOWNLOAD PER SWA ENGINEERING PARAMETERS GOOD FOR CONTINUED SERVICE. C/W ENG IDLE TEST 3A PER AMM 71-00-00