MEL-Topicos de Especialidad

Document Purpose This document is intended to assist airline operations and maintenance organizations in developing the procedures required to operate the airplane in the various nonstandard configurations allowed by the Federal Aviation Administration (FAA) Master Minimum Equipment List (MMEL) and the Airplane Flight Manual (AFM) Appendix Configuration Deviation List (CDL). Background The FAA publishes a MMEL for each airplane model that is written in a brief format that does not include the detailed procedures necessary to properly prepare and operate the airplane. The AFM Appendix CDL does not include illustrations for positive identification of secondary airframe and engine parts that may be missing for dispatch. Historically, operators have found difficulty in developing procedures and identifying missing parts. They have often consulted Boeing for guidance in these areas and as a result, this document was prepared for reference.

Configuration Desviation List Minimum Equipment List

El MMEL es un manual elaborado por la autoridad de diseo y los fabricantes, para entregar las opciones de continuar las operaciones con vuelos seguros y en forma satisfactoria. En general, se requiere que todos los equipamientos instalados en una aeronave se encuentren operativos cumpliendo los estndares de aeronavegabilidad y las reglas de operacin, sin embargo, las reglas tambin permiten la publicacin de un listado de equipamientos mnimos (MEL) donde se permite el vuelo seguro con algunos equipamientos no operativos.

La experiencia ha demostrado que con el nivel de redundancia diseado en los aviones, la operacin de cada sistema o componente instalado puede no ser necesario cuando el resto de los equipos se encuentra operativos y pueden entregar un nivel aceptable de seguridad. El MMEL incluye estos Items de equipos que pueden estar inoperativos, obviamente estos no incluyen a piezas esenciales tales como alas, rudder o flaps.

PART 129 OPERATIONS: FOREIGN AIR CARRIERS AND FOREIGN OPERATORS OF U.S.-REGISTERED AIRCRAFT ENGAGED IN COMMON CARRIAGE

129.14 Maintenance program and minimum equipment list requirements for U.S.-registered aircraft. (b) No foreign air carrier or foreign person may operate a U.S.-registered aircraft with inoperable instruments or equipment unless the following conditions are met: (1) A master minimum equipment list exists for the aircraft type.

(2) The foreign operator submits for review and approval its aircraft minimum equipment list based on the master minimum equipment list, to the FAA Flight Standards District Office having geographic responsibility for the operator. The foreign operator must show, before minimum equipment list approval can be obtained, that the maintenance procedures used under its maintenance program are adequate to support the use of its minimum equipment list.

5) The approved minimum equipment list provides for the operation of the aircraft with certain instruments and equipment in an inoperable condition. (6) The aircraft records available to the pilot must include an entry describing the inoperable instruments and equipment. (7) The aircraft is operated under all applicable conditions and limitations contained in the minimum equipment list and the operations specification authorizing the use of the list.

121.628 Inoperable instruments and equipment. (a) No person may take off an airplane with inoperable instruments or equipment installed unless the following conditions are met: (1) An approved Minimum Equipment List exists for that airplane. (2) The certificate-holding district office has issued the certificate holder operations specifications authorizing operations in accordance with an approved Minimum Equipment List.

121.628 Inoperable instruments and equipment. The flight crew shall have direct access at all times prior to flight to all of the information contained in the approved Minimum Equipment List through printed or other means approved by the Administrator in the certificate holders operations specifications. (3) The approved Minimum Equipment List must: Provide for the operation of the airplane with certain instruments and equipment in an inoperable condition. (4) Records identifying the inoperable instruments and equipment and the information must be available to the pilot.

121.801 DOCUMENTOS QUE DEBEN LLEVAR LAS AERONAVES A BORDO. (a) 3(v) Lista de Equipos Mnimos (Minimun Equipment List, MEL), aprobadapor la DGAC, junto a los procedimientos operacionales y de mantenimiento, para cada aeronave en particular. 121.813 LISTA DE EQUIPAMIENTO MNIMO (MEL) y GUIA DE DESVIACIN PARA EL DESPACHO (DDG). (a) Los operadores areos que posean aeronaves cuyo organismo de diseo haya generado un Master MEL (MMEL) y desee operar con equipos o sistemas inoperativos, deber contar con una Lista de Equipamiento Mnimo (MEL)

y una Gua de Desviacin para el Despacho (DDG) o equivalente tales como procedimientos de operaciones y de mantenimiento, establecidos por el Operador y aprobada por la DGAC. (b) La MEL propuesta por el Operador deber estar basada en la ltima revisin del Master MEL (MMEL) aplicable al modelo de la aeronave y estar incluida en su Manual de Operaciones. (c) Todo equipo o sistema no considerado en la MEL aprobada, debe encontrarse operativo al momento del despacho de la aeronave. (d) Todo operador que opte por operar sin MEL, deber hacerlo con todo su equipo en condiciones operativa.

Se entrega al

Operador

Requerimientos

DGAC +

Operacin

Copia

Autoridad revisa y

aprueba

Copia aprobada por la autoridad de matricula

A. "Item" (Column 1) means the equipment, system, component, or function listed in the "Item" column. Repair Interval categories (A, B, C, and D) are listed on the right side of Column 1. B. "Number Installed" (Column 2) is the number (quantity) of items normally installed in the aircraft. This number represents the aircraft configuration considered in developing this MMEL. Should the number be a variable (e.g., passenger cabin items) a number is not required. C. "Number Required for Dispatch" (Column 3) is the minimum number (quantity) of items required for operation provided the conditions specified in Column 4 are met.

"Item" (Column 1) means the equipment, system, component, or function listed in the "Item" column.

Repair Interval categories (A, B, C, and D) are listed on the right side of Column 1. Category A. Items in this category shall be repaired within the time interval specified in the remarks column of the operator's approved MEL. For time intervals specified in calendar days or "flight days," the day the malfunction was recorded in the aircraft maintenance record/logbook is excluded. For all other time intervals (flights, flight legs, cycles, hours, etc), repair tracking begins at the point when the malfunction is deferred in accordance with the operator's approved MEL.

Category B. Items in this category shall be repaired within three (3) consecutive calendar days (72 hours), excluding the day the malfunction was recorded in the aircraft maintenance record/logbook. For example, if it were recorded at 10 a.m. on January 26th, the three day interval would begin at midnight the 26th and end at midnight the 29th. Category C. Items in this category shall be repaired within ten (10) consecutive calendar days (240 hours), excluding the day the malfunction was recorded in the aircraft maintenance record/logbook. For example, if it were recorded at 10 a.m. on January 26th, the 10 day interval would begin at midnight the 26th and end at midnight February 5th.

Category D. Items in this category shall be repaired within one hundred and twenty (120) consecutive calendar days (2880 hours), excluding the day the malfunction was recorded in the aircraft maintenance log and/or record.

" "Number Installed" (Column 2) is the number (quantity) of items normally installed in the aircraft. This number represents the aircraft configuration considered in developing this MMEL.

"Number Required for Dispatch" (Column 3) is the minimum number (quantity) of items required for operation provided the conditions specified in Column 4 are met.

"Remarks or Exceptions" (Column 4) in this column includes a statement either prohibiting or permitting operation with a specific number of items Inoperative, provisos (conditions and limitations) for such operation, and appropriate notes. "Notes:" in Column 4 provides additional information for crewmember or maintenance consideration. Notes are used to identify applicable material which is intended to assist with compliance, but do not relieve the operator of the responsibility for compliance with all applicable requirements.

"(M)" symbol indicates a requirement for a specific maintenance procedure which must be accomplished prior to operation with the listed item inoperative.

Normally these procedures are accomplished by maintenance personnel; however, other personnel may be qualified and authorized to perform certain functions. Procedures requiring specialized knowledge or skill, or requiring the use of tools or test equipment should be accomplished by maintenance personnel. The satisfactory accomplishment of all maintenance procedures, regardless of who performs them, is the responsibility of the operator. Appropriate procedures are required to be published as part of the operator's manual or MEL.

"(O)" symbol indicates a requirement for a specific operations procedure which must be accomplished in planning for and/or operating with the listed item inoperative.

Normally these procedures are accomplished by the flight crew; however, other personnel may be qualified and authorized to perform certain functions. The satisfactory accomplishment of all procedures, regardless of who performs them, is the responsibility of the operator. Appropriate procedures are required to be published as apart of the operator's manual or MEL. "Deactivated" and "Secured" means that the specified component must be put into an acceptable condition for safe flight. An acceptable method of securing or deactivating will be established by the operator.

EICAS Messages EICAS consolidates engine and subsystem indications and provides a centrally located crew alerting function. EICAS displays System Alerts (Warning, Caution, and Advisory), communication Alerts, and Status messages.

Warning A non-normal operational or system condition displayed in red text accompanied by annunciation of the master warning lights and an aural warning (bell,siren, clacker, wailer or voice). Immediate crew awareness and corrective action is required. Caution A non-normal operational or system condition displayed in amber text accompanied by annunciation of the master caution lights and an aural caution (voice or beeper). Immediate crew awareness is required and corrective action may be required.

Advisory A non-normal operational or system condition displayed in amber text and indented one space to the right. Routine crew awareness is required and corrective action may be required.

This Master Minimum Equipment List ( MMEL ) is a reference manual published in English. It is approved by the European Aviation Safety Agency ( EASA ). This MMEL must be used as a reference by the Operator to develop its MEL . This MMEL takes into account the specific configuration of each aircraft of the Operator's fleet.

This MEL has four sections:

MEL Items (MI) : This section is approved by the Aeronautical Authorities and lists all the MEL items with the associated dispatch conditions.

MEL Operational Procedures (MO): This section gives the operational procedures that are associated with theMEL items

How to Use (HOW) : This section contains general information and describes the organization of the manual.

MEL Entries (ME) : This section lists all the ECAM alerts and indicates the associated MEL item (if any) to apply for dispatching the aircraft. This section is a user-friendly entry point for the flight crew and the maintenance personnel when an ECAM alert reports a system failure.

This MEL is made of Documentary Units (DU). The DUs contain the technical data. In the MEL, a DU can be: An ECAM alert, An MEL item, An MEL operational procedure.

MEL Items (MI) : This section is approved by the Aeronautical Authorities and lists all the MEL items with the associated dispatch conditions.

MEL Operational Procedures (MO): This section gives the operational procedures that are associated with theMEL items



This section lists all the ECAM alerts. The ECAM monitors the condition of some systems. In the case of malfunction of one or more systems, the ECAM provides the flight crew with an associated ECAM alert. Refer to MI-00-08 ECAM and MAINTENANCE STATUS . For each ECAM alert, this section indicates the associated MEL item (if any) to be applied for the dispatch. When an ECAM alert reports a system failure, the flight crew and the maintenance personnel should refer to this section as a user-friendly entry point in the MEL .

AIRCRAFT STATUS COLUMN An ECAM alert may cover one or several failure modes of the monitored system. For each failure mode, the AIRCRAFT STATUS column may indicate the following status: NIL : When there is only one failure mode, the AIRCRAFT STATUS column indicates NIL . When there are several failure modes, the AIRCRAFT STATUS column might give a short description of each failure mode and/or a simple way to identify each failure mode. If the MEL does not give this information, the column displays NIL . Actual alert : This indicates that the monitored system is inoperative. The failure mode is the failure of the monitored system. False alert : This indicates that the monitoring system is inoperative. The failure mode is the failure of the monitoring system. The monitored system remains fully operative. The Operator is responsible for identifying the

failure mode.

CONDITION OF DISPATCH COLUMN For each failure mode, the CONDITION OF DISPATCH column gives the applicable MEL item(s) for dispatch. But the flight crew is responsible for checking that the condition of the aircraft systems/components complies with the MEL requirements. If not, the dispatch of the aircraft is not permitted.

DISPATCH CONDITIONS The dispatch conditions indicate (for each applicable item) the suitable conditions, limitations (placards, operational procedures, maintenance procedures) necessary to ensure that an acceptable level of safety is maintained. Some MEL items may have several dispatch conditions. Each dispatch condition offers a different option to dispatch the aircraft. A reference identifies each dispatch condition.

The dispatch condition reference is used: To identify the open MEL items in the logbook, To refer to the associated operational procedure (if any), To refer to the associated maintenance procedure (if any), To provide the Operators engineering and maintenance personnel with a unique reference at fleet level for each option of dispatch for tracking and reporting purposes.

When an MMEL item has several dispatch conditions, the Operator must select and apply only one dispatch condition at a time. An optional title might help the Operator to identify the appropriate dispatch condition. When necessary, the Operator may successively apply other dispatch conditions of the same item provided that the Operator complies with the MMEL requirements and provided that the starting point of the repair interval countdown is not modified.

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MEL-Topicos de Especialidad