OTD in 1997, Comair Flight 3272 (N265CA) an Embraer 120 RT Brasilia crashes while on approach to Detroit Metropolitan Airport in Michigan. All 29 passengers and crew are killed.

“The cause of the crash was determined to be inadequate and out of date flight crew procedures for icing conditions. Some of these originated with the Federal Aviation Administration's failure to specify suitable minimum airspeeds for icing conditions, while some were Comair procedure manual defects, including superseded instructions on the use of de-icing boots that did not follow the aircraft manufacturer's instructions.”

https://asn.flightsafety.org/asndb/324287

Credit of the first photo goes David Oates (https://www.jetphotos.com/photo/9168389).