Why should a fire extinguisher used even briefly during an incident be reported and replaced or recharged before the vehicle returns to service?

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1. This reporting requirement applies only if the extinguisher was completely emptied
2. A partially discharged extinguisher may not have enough remaining capacity to handle a future fire
3. A used extinguisher can be returned to service without any further action
4. Extinguishers automatically recharge themselves once returned to their bracket, using the same pressure system that keeps them mounted securely

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