MEL and CDL are both documents used in aviation to manage aircraft maintenance and ensure safe operations.
MEL stands for Minimum Equipment List. It is a document approved by the aviation regulatory authority, which specifies the minimum equipment required to be operational on an aircraft for flight under certain conditions. The MEL allows an aircraft to operate with certain non-critical systems or components inoperative, provided that the aircraft can still be operated safely. The MEL is used to manage unscheduled maintenance events and ensure that aircraft continue to operate safely and efficiently.
CDL stands for Configuration Deviation List. It is a document that lists the aircraft systems or components that may deviate from the manufacturer’s recommended configuration without affecting the safety of the aircraft. The CDL is created by the aircraft manufacturer and approved by the aviation regulatory authority. It is used to provide operators with flexibility in configuring their aircraft to meet their specific operational needs, while still maintaining the safety and airworthiness of the aircraft.
Both MEL and CDL documents are critical in ensuring the safety and airworthiness of aircraft. They help operators manage maintenance events and ensure that aircraft continue to operate safely, while also allowing for flexibility in aircraft configuration to meet specific operational needs.