How does CDL differ from MEL in BA procedures?

How does CDL differ from MEL in BA procedures?

• A. CDL defines configurations with specific equipment requirements; MEL lists items that may be deferred if safe.
• B. CDL lists maintenance tasks; MEL defines passenger seating.
• C. CDL is for cabin crew duties; MEL is for engine maintenance.
• D. CDL and MEL are identical in purpose.

Answer: (A)

The idea being tested is how the two lists govern when an aircraft can operate with non-standard equipment. A Configuration Deviation List (CDL) specifies which configurations are acceptable and exactly which equipment must be present for each permissible configuration when something is inoperative. It defines the setup the flight can use and what remains required for safe operation. The Minimum Equipment List (MEL) is different: it enumerates items that may be inoperative and still allow flight, but only under defined conditions, with time limits and dispatch restrictions. In other words, MEL tells you what can be deferred, while CDL tells you what configurations are allowed given certain inoperative equipment. So, the correct statement is that the CDL defines configurations with specific equipment requirements, and the MEL lists items that may be deferred if safe. The other options mix up what each list covers or suggest they serve the same purpose, which isn’t how BA procedures distinguish them.

The idea being tested is how the two lists govern when an aircraft can operate with non-standard equipment. A Configuration Deviation List (CDL) specifies which configurations are acceptable and exactly which equipment must be present for each permissible configuration when something is inoperative. It defines the setup the flight can use and what remains required for safe operation.

The Minimum Equipment List (MEL) is different: it enumerates items that may be inoperative and still allow flight, but only under defined conditions, with time limits and dispatch restrictions. In other words, MEL tells you what can be deferred, while CDL tells you what configurations are allowed given certain inoperative equipment.

So, the correct statement is that the CDL defines configurations with specific equipment requirements, and the MEL lists items that may be deferred if safe. The other options mix up what each list covers or suggest they serve the same purpose, which isn’t how BA procedures distinguish them.