August 12, 1985
Mt. Osutaka, near Ueno Village, Japan
Japan Air Lines, Fight 123
Boeing B-747-SR46
JA8119

The aircraft suffered an aft pressure bulkhead failure at 23,900 ft. The aircraft had severe control difficulties with loss of all controls and eventually after 40 minutes, collided with a mountain. Improper repair of bulkhead by Boeing engineers after a tail strike in 1978.  Five-hundred-twenty out of 524 aboard were killed.