Gas explosion on spit roast BBQ injures two

Energy type: 
LPG
 
Event summary: 
The Fire Service reported an incident with a trailer mounted spit roast BBQ. When one of the covers on the BBQ was raised there was an explosion, which burned two men.
 
Accident ID: 
170819-01
 
Accident date: 
19 August 2017
 
Site: 
Domestic
 
Environment: 
Outside (above ground)
 
Voltage: 
1
 
Equipment: 
Other; Other
 
Accident type: 
Fire and explosion
 
Casualty: 
Non-fatality
 
Injury: 
Burn
 
Property damage level: 
No property damage
 
Outcome of investigation: 

The appliance was a large two burner spit roaster BBQ mounted on a trailer. Both sides of the BBQ were being used. When it was noticed that one side had gone out, the hood of that side was raised. It appears the unburned gas was ignited by the side that was still working.
 
The trailer was home-made and it was not established who the builder was.