Related by context. Frequent words. (Click for all words.) 50 oxygen tank 46 oxygen tanks 41 LPG cylinder 41 LPG cylinders 41 oxygen masks 40 propane tank 40 extinguisher 39 liquid oxygen 38 gas canisters 38 gas canister 37 kerosene heater 37 compressed air 37 fire extinguisher 37 anesthetist 37 electrical outlet 37 breathing apparatus 37 fuselage 37 flammable liquid 36 canister 36 extinguishers 36 ventilators 36 cigarette lighter 36 wearing breathing apparatus 35 inhalers 35 incendiary device 35 electrical malfunction 35 pressurization 35 oxygen 35 ignition 34 intubated 34 syringe 34 detonator 34 compressor 34 acetylene 34 liquid propane 34 detonators 34 supplemental oxygen 34 water heater 34 fire extinguishers 34 suction 34 unexploded bomb 34 oxygen mask 34 canisters 34 cockpit 34 parcel bombs 34 copilot 34 jerry cans 33 plane 33 diesel generator 33 intravenous drip 33 intubation 33 aerosol cans 33 air compressor 33 propane tanks 33 luggage 32 tubes 32 butane 32 engine compartment 32 heater 32 oxygen saturation 32 embolism 32 breathable air 32 ventilation 32 landing gear 32 footrest 32 inhaler 32 transformer 32 preventer 32 respiratory 32 rucksack 32 kerosene 32 bladders 32 cockpit voice 32 NTSB 31 chest cavity 31 stove 31 volt battery 31 pipework 31 cooker 31 firebox 31 air compressors 31 flight recorders 31 airway 31 infant 31 diesel generators 31 toilet 31 hydraulic 31 lifejackets 31 lit cigarette 31 explosives 30 CPAP 30 airspeed 30 combustible materials 30 ventilator 30 Randal McCloy Jr. 30 ducting 30 toxic gases 30 explosions 30 pipe 30 ventilating 30 cylinders