What is the maximum quantity of acetylene that can be carried in one package on a passenger-carrying aircraft?

The correct answer is based on the stringent regulations surrounding the transport of hazardous materials on passenger-carrying aircraft. Acetylene is classified as a flammable gas and poses a significant safety risk due to its highly explosive nature when mixed with air.

Due to these safety concerns, regulations explicitly forbid the transportation of acetylene in any quantity aboard passenger aircraft. This prohibition exists to mitigate the risk of fire or explosion, ensuring the safety of passengers and crew. Therefore, any amount of acetylene is considered too dangerous to be transported on such flights, which is why the correct answer identifies that any amount is forbidden.

Understanding this regulation is crucial for aircraft dispatchers, as they must ensure compliance with safety standards while planning and managing flight operations.