While the statistical failure rate is quite low, with the total hours flown, they still happen regularly. http://avherald.com/h?search_term=engine+shut+down&opt

While the statistical failure rate is quite low, with the total hours flown, they still happen regularly. http://avherald.com/h?search_term=engine+shut+down&opt=6144&dosearch=1 http://avherald.com/h?search_term=engine+shut+down&opt=6... A contained battery overtemp failure is not a big deal, but an uncontained battery thermal runaway is a huge safety issue. Qantas A380 was a extremely rare uncontained failure, the most serious type of malfunction. The Hudson A320 was a double engine failure, also is extremely rare. There have been incidents of maintenance SNAFU causing oil loss in all 3 engines on a DC-10, but ETOPS rules for twin aircraft prevent such incidents from maintenance causes. An uncontrolled fire on a plane is a worst case scenario, and ironically in some cases a water ditching might actually be advisable. A contained and extinguished engine fire in one engine is not nearly as critical.