Here is an interesting one......
C-141 Vance AFB 1982
Synopsis: The highly experienced crew was returning to base from a stateside airdrop mission. During some horseplay, cigar ash was introduced into a crew oxygen hose. The resulting oxygen-fed fire ignited floor coverings and filled the cockpit with dense sooty smoke. After some difficulties, the crew was able to recover the aircraft with only minor injuries.
Returning from Pope to Norton after an airdrop mission, the pilot in the left seat decided to light a cigar. The pilot, in the jumpseat, complained and donned his oxygen mask. In response, the left seater covertly disconnected the jumpseater’s mask from the oxygen regulator hose, with the intent of putting smoke into the hose. Accidentally, lit cigar ash entered the oxygen regulator hose, before the hose was reconnected. The jumpseater smelled the smoke and selected "Emergency" on the oxygen regulator. When that didn’t help, he removed the mask to clear the smoke. When he disconnected the mask from the regulator hose, a "2-foot" sheet of fire leapt from the hose. It ignited an oxygen-fed fire that spread to the flooring. To put out the fire, the left seat pilot shut off the crew oxygen system. At about the same time, the engineer while switching to "MAX" airflow, inadvertently hit the bleed duct overheat test switch, shutting off the engine bleed valves and disabling the air-conditioning packs. The crew started a descent but soon became hypoxic. The crew oxygen system was again turned on. The fire reignited with a fireball large enough to melt components on the Flight Engineer’s panel. The crew eventually extinguished the fire, reset the bleed valves, and recovered to the nearest military base. Members of the crew suffered only minor injuries (but major embarrassment).
C-141 Lifetime Mishap Summary