3.10MEL Development Procedures

3.10.1 MEL Basic Format

The MEL must include the following: a List of Effective Pages, a Table of Contents, the Minimum Equipment List Preamble, Notes and Definitions, a section for each aircraft system addressed, the letter of approval and amendment record page. Air operators must specify the MMEL and TC Supplement revisions and any other documents such as an O&M Procedure Manuals (DDPG, DPG, etc), used in the development of their MEL.

3.10.2 MEL Page Format

  1. MEL format is at the discretion of the air operator, provided that it is clear and unambiguous. However, it is recommended that the MEL page format follow the MEL page format of four columns (See Appendix M) The page numbering, and individual MEL items, however, must be in accordance with the ATA 100 code system. (See Appendix T.)

  2. The MEL should incorporate only one item per page, when operations and/or maintenance procedures are required. However, if no procedures are required, or the required action is simple, multiple items may appear on a single page. (See AppendixM)

3.10.3 List of Effective Pages

  1. A List of Effective Pages (LEP) will be used to ensure that each MEL is up-to-date. It must list the date of the last amendment for each page of the MEL. Transport Canada will stamp and initial the List of Effective Pages to indicate the approval status of the contents of the MEL. The date and revision status of each page of the MEL must correspond to that shown on the List of Effective Pages.

    1. Only those pages of the LEP that list the date and revision status of each MEL page need to be stamped and initialled.

    2. The Transport Canada stamped and initialled LEP must be retained on file. Copies of the company MELs may be issued with unstamped LEPs, but the copies must detail the location within the company where the approved LEP is retained.

3.10.4Table of Contents

The Table of Contents page shall list the section for each aircraft system utilizing the ATA 100 listing as found in the MMEL. Pages will be numbered with the ATA system number followed by the item number for that system (e.g., the page following 27-2-1 would be 27-2-2).

3.10.5MEL Preamble

The purpose of the Minimum Equipment List Preamble is to provide direction to company personnel on the philosophy and use of the MEL. Transport Canada publishes a MMEL preamble which is acceptable for use by an air operator (See Appendix F.). An air operator may choose to develop their own preamble but it must contain at least the information contained in the Transport Canada version.

3.10.6Notes and Definitions

Notes and Definitions are required to allow the user to interpret the MEL properly. As a minimum, the notes and definitions contained in Appendix A will be used in the MEL. Additions and deletions to the notes and definitions may be applied to the air operator's MEL as required.

3.10.7Operating and Maintenance Procedures

  1. Dispatch with inoperative items is often acceptable only with the creation of special operating or maintenance procedures.

  2. Where the MMEL indicates that this is the case, the air operator must establish and publish appropriate procedures for inclusion in the MEL. Procedures recommended by the aircraft manufacturer in most cases can be adopted for this purpose, but the ultimate responsibility for providing acceptable procedures to be approved in the MEL rests with the air operator. These procedures will ensure that a satisfactory level of safety will be maintained. (See Section3.15.1)

  3. The air operator, when comparing the MEL against the MMEL must ensure that where the (O) or (M) symbols appear, an operating or maintenance procedure has been developed that provides clear direction to the crew members and maintenance personnel of the action to be taken. This procedure must be included in the MEL.

  4. The only exception is when the procedure is contained in another document that is available:

    1. to the flight crew on the flight deck, such as an Aircraft Flight Manual, Aircraft Operating Manual, or the Company Operations Manual;

    2. to the flight attendants, such as a Company Operations Manual or Flight Attendant Manual;

    3. to the maintenance crew, such as an Aircraft Maintenance Manual (e.g. - the Airbus Aircraft Deactivation Procedures Manual), Maintenance Control Manual, etc.


  5. In these cases, the MEL may refer to a section of the appropriate document.

  6. It is not acceptable to reference the Canadian Aviation Regulations or similar documents, as these are not carried on board the aircraft and could be subject to misinterpretation. The objective is to provide personnel with clear, concise direction on how they are to proceed. Where the MMEL column 4 states "as required by Regulation", this wording shall not appear in the MEL; rather, a synopsis of the Regulation shall appear.

3.10.8Approval of Operating and Maintenance Procedures

Manufacturers may choose to produce operating and maintenance procedures such as Dispatch Deviation Procedure Guides, for use by air operators. These procedures may be inserted into the appropriate MEL pages, and submitted by the air operator, to form part of the MEL. Dispatch Deviation Procedures Guides, Dispatch Deviation Guides, and other similar documents cannot be approved by Transport Canada, nor can they replace the MEL. If the aircraft manufacturer has not published operating or maintenance procedures, the air operator must develop appropriate procedures and submit them to Transport Canada for approval.

3.10.9Operations Manual Procedures

The air operator must establish procedures in the company Operations Manual for the use and guidance of crew members when using the MEL. The procedures must agree with those in the Maintenance Control Manual. The air operator may choose to include all procedures/instructions in the MEL itself; in which case the Operations Manual will only be required to reference this document.

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