But - excuse me, a fire causing terminal structural damage in 3 minutes?
But you have to put it into context. The process to repair a 135 tailboom requires hot bond temperatures of about 125 C. The T1 fire detectors actuate at 210 C - 270 C. Composite structural strength becomes compromised starting around 300 C. And any fuel/oil fire will burn at a much higher temperature. Given the use of heat resistant composites (800+ C) is regulated to areas that may see high heat or fire like an engine bay, the rest of the structures use various standard methods. For reference, most aluminum structures begin to structurally degrade at 600+C.