If you suspect a problem with oxygen equipment on board, what is the recommended sequence?

• A. Attempt to fix immediately and continue flight.
• B. Do not touch; notify PIC and follow SOP; evacuate if necessary.
• C. Ignore and continue as normal.
• D. Replace the oxygen equipment with a spare unit from storage.

Answer: (B)

When oxygen equipment is suspected to be faulty, the safety priority is to avoid tampering with the system and to follow the established chain of command. Oxygen systems are critical for maintaining safe oxygen levels for crew and passengers, especially in decompression or smoke scenarios; making an on-the-spot repair without proper training or authorization can worsen the problem or leave the system unsafe.

The correct course is to stop handling the equipment, immediately inform the Pilot in Command, and follow the Standard Operating Procedures. The PIC will assess the situation, coordinate with maintenance, and decide whether to divert, land, or take other actions as needed. If the situation poses an immediate hazard to safety, evacuation may be necessary.

Replacing with a spare unit, attempting to fix it, or continuing as normal without proper authority and procedures are not appropriate responses in this scenario, as they assume stability where safety could be compromised.