What about these examples - couldn't find the one I had a memory of ( Chinese brought down a 747 ?) but if you look further there are many examples of military mistakes and deliberate downing a of civil aircraft?
Korean Air Lines Flight 007, also known as KAL 007 or KE007, was a Korean Air Lines Boeing 747 civilian airliner shot down by a Soviet Su-15TM fighter on September 1, 1983, near Moneron Island just west of Sakhalin island. 269 passengers and crew, including US congressman Larry McDonald, were aboard KAL 007; there were no known survivors. An official investigation concluded that the course deviation was likely caused by pilot error in configuring their air navigation system.
Iran Air Flight 655 (IR655) was a commercial flight operated by Iran Air that flew from Bandar Abbas, Iran to Dubai, UAE. On July 3, 1988, towards the end of the Iran-Iraq War, the aircraft flying IR655 was shot down by the U.S. Navy Ticonderoga-class guided missile cruiser USS Vincennes when it fired a SM-2MR surface-to-air missile. The airplane was destroyed between Bandar Abbas and Dubai, killing all 290 passengers and crew. It was later determined that USS Vincennes was in Iranian waters at the time of the attack, and IR655, an Airbus A300, was misidentified as an Iranian F-14.[23]
A number of these civil aircraft downings have been in the Malaysian and Korean area