Where is oxygen servicing of aircraft accomplished?

• A. Inside the Hangar
• B. On the flight line
• C. In the maintenance bay
• D. Outside the Hangar

Answer: (D)

Oxygen servicing is done outdoors because oxygen is a strong oxidizer and any leaks or spills can create a fire hazard. In an open, well-ventilated outdoor area, any oxygen that escapes is quickly dispersed, reducing the risk of an enriched atmosphere near fuel, oils, or ignition sources. This environment also makes it easier to control potential hazards and ensures the area remains free of contaminants that could react with oxygen. In practice, you’d still use oxygen‑safe equipment and follow strict handling procedures, but the location outdoors minimizes the danger if a leak occurs.