As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PORTION OF NR 2 ENG FAN COWLING MISSING. CENTER ADVISED METAL WAS FOUND ON DEPARTURE PATH FROM OAK. PASSING 15,000 FEET THE A/C WAS JOLTED BUT NO OTHER INDICATIONS WERE NOTED. INSTALLED LEFT HAND FAN COWL FWD, CTR AND AFT HINGE BRACKETS. INSTALLED LEFT HAND FAN COWL. REFERENCE DWG AVB7050 AND EA 8-5410-89203. SECURED AND CLOSED FAN COWL AND PATIO. RETURNED TO SERVICE.