Question: What was the fault log ID with the most number of faulty parts?
SQL: SELECT T1.fault_log_entry_id FROM Fault_Log AS T1 JOIN Fault_Log_Parts AS T2 ON T1.fault_log_entry_id   =   T2.fault_log_entry_id GROUP BY T1.fault_log_entry_id ORDER BY count ( * )  DESC LIMIT 1