What restrictions apply to dangerous goods on passenger aircraft?

• A. Many DG are prohibited or restricted; only certain goods in limited quantities may be allowed, and only under PI/SP conditions.
• B. All DG are allowed without restrictions.
• C. DG can be transported on passenger aircraft without labeling.
• D. DG are prohibited to any extent on passenger aircraft.

Answer: (A)

The main idea is that dangerous goods on passenger aircraft are tightly controlled. Most dangerous goods are either prohibited or restricted on passenger services, so only a select set can be carried, and even that must be in limited quantities and under exact conditions. These conditions come from the IATA Dangerous Goods Regulations, specifically the Packing Instructions and Special Provisions. If a dangerous good is allowed, it must be packaged properly, labeled or marked as required, documented, and handled by trained personnel. That’s why the correct answer says that many dangerous goods are prohibited or restricted, and only certain items in limited quantities may be allowed under PI/SP conditions. The other statements don’t fit because labeling is usually required for permitted goods, and not all dangerous goods can be carried on passenger aircraft, with some being outright prohibited.