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M10.6 Continuing Airworthiness

Detailed Understanding of :

Detailed Understanding of: 

M10.6 Continuing Airworthiness

Detailed Understanding of :Part 21 Provisions relating to Continuing Airworthiness

Detailed Understanding of: Part M

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Part 21 Provisions relating to Continuing Airworthiness

Part 21 Provisions relating to Continuing Airworthiness

In order to fully understand the Continuing Airworthiness requirements, it is necessary to have an understanding of the initial airworthiness requirements. In simple terms, an aircraft/component is designed and produced to a certain standard which is defined under initial airworthiness. Throughout its lifetime, this aircraft/component shall be maintained according to continuing airworthiness requirements. It is therefore necessary to have an understanding of this. Described below are certain extracts which will enable the reader to gain a detailed understanding of Part 21 relating to continuing airworthiness.

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Part 21 Provisions relating to Continuing Airworthiness

Regulation EU No. 748/2012 Annex 1 - Part 21

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Part 21 Provisions relating to Continuing Airworthiness

Extracts from Part 21 in relation to Continuing airworthiness

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Part 21 Provisions relating to Continuing Airworthiness

Extracts from Part 21 in relation to Continuing airworthiness

  • 21.A.3A System for collection, investigation and analysis of data
  • AMC No.1 to 21.A.122 Eligibility - Link between design and production
  • 21.A.129 Obligations of the Manufacturer
  • GM.21.A.431A Scope
  • 21.A.62 Availability of Operational Suitability Data
  • 21.A.61 Instructions for Continued Airworthiness

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Part 21 Provisions relating to Continuing Airworthiness

Extracts from Part 21 in relation to Continuing airworthiness

  • 21.A.3A System for collection, investigation and analysis of data

21.A.3A System for collection, investigation and analysis of data

The Holder of a TC, RTC, STC, ETSO authorization,  major repair design approval or any other relevant approval deemed to have been issued under this regulation shall have a system for collecting, investigating, and analyzing reports of an information related to failures, malfunctions, defects or other occurrences which cause or might cause adverse effects on the continuing airworthiness of the product, part or appliance covered by the TC, RTC, STC, ETSO authorization, major repair design approval or any other relevant approval deemed to have been issued under this regulation. Information about this system shall be made available to all know operators of the products, parts or appliances and on request, to any person authorized under other associated Implementing Regulations

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Part 21 Provisions relating to Continuing Airworthiness

Extracts from Part 21 in relation to Continuing airworthiness

  • AMC No.1 to 21.A.122 Eligibility - Link between design and production

AMC No.1 to 21.A.122 Eligibility - Link between design and production

  • To achieve satisfactory coordination the documented arrangements must at least define the following aspects irrespective of whether the DO and the person producing or intending to produce under Part 21 Subpart F are separate legal entities or not:
    • The responsibilities of the manufacturer to assist the DO in dealing with continuing airworthiness matters and for required actions (e.g. traceability of parts in case of direct delivery to users, retrofitting of modifications, traceability of processes' outputs and approved deviations for individual parts as applicable, technical information and assistance, etc.)

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Part 21 Provisions relating to Continuing Airworthiness

Extracts from Part 21 in relation to Continuing airworthiness

  • 21.A.129 Obligations of the Manufacturer

21.A.129 Obligations of the Manufacturer

  • Each manufacturer of a product, part or appliance being manufactured under this subpart shall:
    • Provide assistance to the holder of the TC, RTC or Design Approval in dealing with any continuing airworthiness actions that are related to the products, parts or appliances that have been produced.

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Part 21 Provisions relating to Continuing Airworthiness

Extracts from Part 21 in relation to Continuing airworthiness

  • GM.21.A.431A Scope

GM.21.A.431A Scope

Manuals and other instructions for continued airworthiness (such as the Manufacturers Structural Repair Manual, Maintenance Manual and Engine Manuals provided by the holder of the TC, STC, or APU ETSO authorization as applicable) for operators, contain useful information for the development and approval of repairs.

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Part 21 Provisions relating to Continuing Airworthiness

Extracts from Part 21 in relation to Continuing airworthiness

  • 21.A.62 Availability of Operational Suitability Data

21.A.62 Availability of Operational Suitability Data

  • The holder of the TC or RTC shall make available:
    • At least one set of complete operational suitability data prepared i.a.w the applicable operational suitability certification basis, to all known EU operators of the aircraft, before the operational suitability data must be used by a training organization or an EU operator and
    • Any change to the operational suitability data to all known EU operators of the aircraft and
    • On request provided the same to Competent Authority responsible for verifying conformity with one or more elements of this set of operational suitability data and
    • Any person required to comply with one or more elements of this set of operational suitability data

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Part 21 Provisions relating to Continuing Airworthiness

Extracts from Part 21 in relation to Continuing airworthiness

  • 21.A.61 Instructions for Continued Airworthiness

21.A.61 Instructions for Continued Airworthiness

  • The holder of the TC, RTC, shall furnish at least one set of complete instructions for continued airworthiness, comprising descriptive data and accomplishment instructions prepared i.a.w the applicable type certification basis, to each known owner of one or more aircraft, engine or propeller upon its delivery or upon issue of the first CoA for the affected aircraft, whichever occurs later and thereafter make those instructions available on request to any other person required to comply with any of the terms of those instructions. The availability of some manual or portion of the instruction for continued airworthiness, dealing with overhaul or other forms of heavy maintenance, may be delayed until after the product has entered into service, but shall be available before any of the products reaches the relevant age or flight hours/cycles.
  • In addition, changes to the instructions for continued airworthiness shall be made available to all known operators of the product and shall be made available on request to any person required to comply with any of those instructions. A program showing how changes to the instructions for continued airworthiness are distributed shall be submitted to the EASA.

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Part M

Regulation EU No.1321/2014 Annex I - Part M

Annex I - Part M consists of:

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Part M

Why Part M?

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Part M

  • Subpart A: 

Subpart A : General

This section establishes the measures to be taken to ensure that airworthiness is maintained, including maintenance. It also specifies the conditions to be met by the persons or organization involved in such continuing airworthiness management.

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Part M

  • Subpart B:
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Subpart B : Accountability

  • M.A.201 Responsibility

  • M.A.202 Occurrence Reporting

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Part M

  • Subpart B : Accountability

    • M.A.201 Responsibility

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Part M

  • Subpart B : Accountability
    • M.A.202 Occurrence Reporting

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Part M

  • Subpart C : 
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Subpart C : Continued Airworthiness

  • M.A.301 Continuing Airworthiness Tasks
  • M.A.302 Maintenance Program
  • M.A.303 Airworthiness Directives
  • M.A.304 Data for Modification or Repair
  • M.A.305 Aircraft Continuing Airworthiness Record System
  • M.A.306 Aircraft Technical Log System

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Part M

  • Subpart C : 
    • M.A.301 Continuing Airworthiness Tasks

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Part M

  • Subpart C : Continued Airworthiness
    • M.A.302 Maintenance Program

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Part M

  • Subpart C : Continued Airworthiness
    • M.A.303 Airworthiness Directives

M.A.303 Airworthiness Directives

  • Any applicable AD must be carried out within the requirements of that AD, unless specified by EASA

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Part M

  • Subpart C : Continued Airworthiness
    • M.A.304 Data for Modification or Repair

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Part M

  • Subpart C : Continued Airworthiness
    • M.A.305 Aircraft Continuing Airworthiness Record System

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Part M

  • Subpart C : Continued Airworthiness
    • M.A.306 Aircraft Technical Log System

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Part M

  • Subpart D: 

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Part M

  • Subpart E: 
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Subpart E : Components

  • No component is acceptable unless released to service on EASA Form 1 or equivalent
  • Organization shall ensure that the particular component is eligible to be fitted when different modification and/or AD configurations may be applicable
  • Material being either raw material or consumable material shall only be used when the aircraft or component manufacturer states so in relevant maintenance data or as specified in Part 145 . Such material shall only be used when the material meets the required specification and has appropriate traceability.
  • M.A.501 Classification of Components

  • M.A.502 Component Maintenance

  • M.A.503 Service Life Limited Components

  • M.A.504 Segregation of Components

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Part M

  • Subpart E: Components
    • M.A.501 Classification of Components

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Part M

  • Subpart E: Components​
    • M.A.502 Component Maintenance

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Part M

  • Subpart E: Components​
    • M.A.503 Service Life Limited Components

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Part M

  • Subpart E: Components​
    • M.A.504 Segregation of Components

Subpart E: Components​

  • M.A.504 Segregation of Components
    • Unserviceable and Unsalvageable components shall be segregated from serviceable components, standard parts and materials.
    • Unsalvageable components shall not be permitted to re-enter the component supply system unless certified life limits have been extended or repair solution has been approved i.a.w. EU No. 748/2012

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Part M

  • Subpart F :

Part M

  • Subpart F : GA (General Aviation) Non Commercial Maintenance