1.8 Aircraft flight manual (AFM), master minimum equipment list (MMEL) and configuration deviation list (CDL)
1.8.1 General
1.8.1.1 The aircraft flight manual (AFM), the configuration deviation list (CDL) and the master minimum equipment list (MMEL) are approved by the State of Design and often established by the organization responsible for the type design. The State of the Registry may either validate these documents or approve its own which could be different due to differences in its airworthiness rules. These documents should not be less restrictive than the one approved by the State of Design.
1.8.1.2 The use by the operator of those documents is described in Chapter 1.12 of Part IV of this manual.
1.8.2 Aircraft flight manual (AFM)
1.8.2.1 Annex 8 requires that the AFM shall be made available as a main document associated with an aircraft Certificate of Airworthiness. The AFM is a primary document for flight operations of an aircraft. It contains the limitations, procedures, performance and other information and instructions required to operate the aircraft safely, plus all required AFM supplements. An AFM supplement is a booklet or group of pages containing changes to the information and instructions in the basic AFM (i.e. the approved AFM that the Type Certificate holder provides with the aircraft). The AFM supplement contains AFM changes that are necessary for continued safe operation of an aircraft that is modified, is in a non-standard configuration, has special role equipment fitted, or is to engage in some special purpose activity. An aircraft may not conform exactly to the standard aircraft to which the available basic AFM is applicable. The aircraft may have a different configuration or modifications. If these physical differences cause changes to the approved AFM information, those changes must be accounted for by relevant CAA-approved AFM supplements that provide the necessary extra AFM information.
1.8.2.2 The Type Certificate holder or its licensee should make available a current AFM at the time of delivery of the aircraft to the owner (operator). On the other hand, the certificated operator has an ongoing obligation to keep his flight crew operating manual up-to-date by incorporating amendments approved by the relevant CAA for the AFM.
1.8.2.3 An aircraft operator should use the appropriate parts of the AFM approved for this aircraft together with operating instructions issued by the Type Certificate holders to develop its own operations manual (as required in Annex 6, Part I, 4.2.2 and Part III, Section II, 2.2.2).
1.8.3 Master minimum equipment list (MMEL)
1.8.3.1 The MMEL is a master list appropriate to an aircraft type which determines those instruments, items of equipment or functions that, while maintaining an acceptable level of safety as intended by the applicable requirement, may temporarily be inoperative either due to the inherent redundancy of the design, and/or due to specified operational and maintenance procedures, conditions and limitations, and in accordance with the applicable procedures for continued airworthiness.
1.8.3.2 In conjunction with the certification of each new type of aircraft, a board should be established to develop and maintain the MMEL for the aircraft and additional models of that aircraft developed in the future. The board is an advisory body to the CAA and should have representation from the flight operations and airworthiness (AID and ACD) organizations within the CAA, as well as from the organization responsible for the type design and operators of the aircraft. The MMEL board could be an independent organizational body headed by the CAA.
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