"Late on the night of June 17, 1984, a fire broke out in the Qamba Buddha Hall of the Potala Palace caused by short-circuit. On account of shortage of fire-fighting facilities, it took three hours for the firefighters, lamas, and residents nearby to put the fire out. An invaluable sutra Bstan-hgyur was burned almost by half."
http://news.xinhuanet.com/english/2009-02/26/content_10900710.htm
"From 1965 to 1985, Qungda served in the fire control department of Lhasa and fought a serious fire in one of the chapels of the palace in 1984, the fourth fire in the palace's history."
http://eng.tibet.cn/2010home/news/today/201105/t20110505_1023741.html