| Date: | February 02, 1999 |
| Location: | Rui'an, China |
| Aircraft: | Tupolev TU-154 |
| Reg: | B-2622 |
| Airline: | China Southwest Airlines |
| Flight No: | 4509 |
| Fatalities: | 61 : 61 |
| The aircraft was on a flight from Chengdu to Wenzhou when it crashed into a field while on approach to Wenzhou Airport. An improperly installed nut worked its way lose and led to loss of elevator control. |