As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING GEAR RETRACTION, GEAR FAILED TO RAISE. RAN CHECKLIST & RETURNED FOR LANDING. FOUND DEBRIS AROUND LANDING GEAR MANUAL EXTENSION SYS ACCESS DOOR. CLEANED. PERFORMED MAIN LANDING GEAR OPS TEST IAW AMM 32-32-00-710-801. NO DISCREPANCIES NOTED. ACFT OK FOR SERVICE.