During an oven incident, if flames appear after SKI, what OSCR steps should be followed?

During an oven incident, if flames appear after SKI, what OSCR steps should be followed?

• A. Spray from outside
• B. Close door first; no spray
• C. Wait and do nothing
• D. Open oven door 2-5cm; Spray BCF/HALON into oven; Close door; Leave 30 seconds; Re-check

Answer: (D)

Handling an oven fire on board relies on a measured sequence that gets the extinguishing agent into the flame while controlling heat and oxygen. The best approach is to open the oven door slightly, about 2–5 cm, to vent heat and create a path for the suppressant to reach the interior without letting a surge of fresh air flood the flame. Then directly spray the extinguishing agent (BCF or HALON) into the oven, aiming to reach the flame zone so the agent can absorb heat and blanket the fire. After spraying, close the door to seal the oven and cut off oxygen, helping to smother the fire and keep the suppressant inside where it can work. Leave it for about 30 seconds, then re-check for any signs of re-ignition. If flames linger, repeat the process as required. Spraying from outside won’t effectively reach the interior flame and can waste suppressant, closing the door before spraying traps heat and oxygen where the fire can persist, and waiting and doing nothing allows the fire to grow.

Handling an oven fire on board relies on a measured sequence that gets the extinguishing agent into the flame while controlling heat and oxygen. The best approach is to open the oven door slightly, about 2–5 cm, to vent heat and create a path for the suppressant to reach the interior without letting a surge of fresh air flood the flame. Then directly spray the extinguishing agent (BCF or HALON) into the oven, aiming to reach the flame zone so the agent can absorb heat and blanket the fire. After spraying, close the door to seal the oven and cut off oxygen, helping to smother the fire and keep the suppressant inside where it can work. Leave it for about 30 seconds, then re-check for any signs of re-ignition. If flames linger, repeat the process as required.

Spraying from outside won’t effectively reach the interior flame and can waste suppressant, closing the door before spraying traps heat and oxygen where the fire can persist, and waiting and doing nothing allows the fire to grow.