As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH 8000K HEARD A LOUD BANG ACCOMPANIED BY VIBRATIONS. LEFT ENGINE RPM ROLLED BACK AND EGT RISING. ACCOMPLISHED CHECKLIST AND SHUT DOWN ENGINE. NO FIRE WARNING RIGHT INSP INLET AND EXHAUST, NO DAMAGE NOTED. REPLACED MAIN OIL FILTER 1386688. INSP LEFT ENG INLET AND EXHAUST FOUND METAL IN TAIL PIPE 1386688. REPLACED LEFT ENGINE PER TRANS 9T102. CHECK GOOD.