Severity
Near-Miss
Was Hydrogen Released?
Yes
Was There Ignition?
No
Incident Date
Describe the incident, including corrective steps taken and their result.
A vehicle fill was initiated by the operator. During the hose pressurization step, a leak was observed at the breakaway fitting. The operator pressed the emergency stop to terminate the fill.
Lessons Learned
The fitting was an SAE straight thread and was likely loosened by torque applied to the fueling hose. After the incident, these fittings had additional means applied to restrict loosening, a cover installed to deflect any leakage, and means taken to restrict hose torque by using a different style nozzle. In addition, different fittings have now been deployed.