CAMs 222362 - Minor combustion event on rear of multi-sprayer truck
Method/Process
Material
Personnel/People
Machine
Maintenance
Sprayer Operator with 20 years experience
Sprayer Operator made changes to the airline system
Sprayer Operator is not a mechanic tradesman
Insulation was coated with bitumen, cleaning product, water
Guarding over the top of the bitumen pipes and created a sauna effect
No written process for best practice of cleaning a sprayer
SWMS for washbay (may need review)
Operators that were not sprayer operators, cleaned the truck
The cleaning process of cleaning agents, a gernie and volume of product contributed to soaking of insulation
It is unknown which brand type solvents were used to clean the truck
The recycling unit recycles treated water, when it recycles it is still sending the product out (not just water being pumped through)
Workshop have incorrectly re-configured the air system
Sprayer sprayed 3.2m litres in 2 months working out West and returned to site in a LTA condition
What is the process when a sprayer is lent elsewhere to ensure cleanliness upon return to originating BU
This is the only multi-sprayer in FHA
Historical design of the truck to the maintenance department is limited
Personnel that were initially trained in operation of this machine has now left employment
Unclear why insulation was placed into the truck
there is no reasoning for why the insulation needed to go into the truck
Added lagging to bitumen pipe which added to the sauna environment
Air isolation lever was obscured from easy access
airline tubing wasn't clad in fire retardant product and has high flammability (susceptible to melting in hot environments)
Checked electrical and was not a means of causation of fire
Post inspection of plant suggests issues with hazardous zones for electrical
Consideration for slips/trips when accessing rear deck