Skip to Content
Civil Aviation Safety Authority Home
Online services
Civil Aviation Safety Authority Home
  • Aerodromes
    • Aerodrome operations
    • Aerodromes register
    • Aerodrome safety
  • Aircraft
    • Aircraft safety
    • Cabin safety
    • Airworthiness
    • Civil aircraft register
    • Foreign operators
    • Fuel
    • Sport aviation
    • Drones
  • Airspace
    • Aeronautical information management
    • Airspace regulation
    • Communications
    • Navigation
    • Surveillance
  • Education
    • Aviation safety advisors
    • eLearning catalogue
    • Seminars and workshops
    • Sponsorship and grants
  • Publications and resources
    • Corporate publications
    • Information sheets, checklists and kits
    • Forms and templates
    • Guidance materials
    • Manuals and handbooks
    • Media hub
    • Research and statistics
    • Online services
    • Temporary management instructions
    • Apps and tools
    • Industry publications
    • Pilot guides and information
  • Rules and regulations
    • Changing the rules
    • Compliance with the rules
    • Current rules
    • Regulation development
  • Safety management
    • Dangerous goods
    • Drug and alcohol management plans
    • Emergencies and incident reporting
    • Fatigue management
    • Hazards
    • Health
    • Human factors
    • Safety management systems
    • Advice for air travellers
  • Licences and certification
    • Aerodromes
    • Aircraft Certification and design
    • Aviation medicine
    • Flight training
    • Flight training organisations
    • Individual licensing
  • About us
    • Careers at CASA
    • Who we are
    • Who we work with
    • Contact us
    • Reporting and accountability
    • Working with industry
    • Events
    • Service Delivery Statistics
    • Site information
    • CASA mailing lists
    • CASA research volunteers
  • Manual of Standards
  • Aerodromes
    • Aerodrome operations
    • Aerodromes register
    • Aerodrome safety
  • Aircraft
    • Aircraft safety
    • Cabin safety
    • Airworthiness
    • Civil aircraft register
    • Foreign operators
    • Fuel
    • Sport aviation
    • Drones
  • Airspace
    • Aeronautical information management
    • Airspace regulation
    • Communications
    • Navigation
    • Surveillance
  • Education
    • Aviation safety advisors
    • eLearning catalogue
    • Seminars and workshops
    • Sponsorship and grants
  • Publications and resources
    • Corporate publications
    • Information sheets, checklists and kits
    • Forms and templates
    • Guidance materials
    • Manuals and handbooks
    • Media hub
    • Research and statistics
    • Online services
    • Temporary management instructions
    • Apps and tools
    • Industry publications
    • Pilot guides and information
  • Rules and regulations
    • Changing the rules
    • Compliance with the rules
    • Current rules
    • Regulation development
  • Safety management
    • Dangerous goods
    • Drug and alcohol management plans
    • Emergencies and incident reporting
    • Fatigue management
    • Hazards
    • Health
    • Human factors
    • Safety management systems
    • Advice for air travellers
  • Licences and certification
    • Aerodromes
    • Aircraft Certification and design
    • Aviation medicine
    • Flight training
    • Flight training organisations
    • Individual licensing
  • About us
    • Careers at CASA
    • Who we are
    • Who we work with
    • Contact us
    • Reporting and accountability
    • Working with industry
    • Events
    • Service Delivery Statistics
    • Site information
    • CASA mailing lists
    • CASA research volunteers
  • Manual of Standards

You are here

  1. Home ›
  2. Aircraft ›
  3. Airworthiness ›
  4. Continuing Airworthiness ›
  5. Airworthiness advisory circulars ›
  6. Part 6 - General Advice ›
  7. Airworthiness Advisory Circulars - Part 6-74 - Removal of Inoperative Equipment

Aircraft

  • Aircraft safety
    • Electronic flight bag
    • International safety and security
    • Carriage and discharge of firearms from an aircraft
    • Procedural criteria for carriage and discharge of firearms from an aircraft
    • Charter substitution arrangements
    • Aerial Application Operations (other than rotorcraft)
  • Cabin safety
  • Airworthiness
    • Continuing airworthiness
    • Airworthiness directives
    • Aircraft flight test and evaluation
    • Maintenance regulations
    • Manufacturing
    • Cessna supplemental inspection documents
    • Airworthiness contacts
    • Information for operators of R22 and R44 helicopters
  • Civil aircraft register
    • Aircraft register search
    • Aircraft registration
    • Aircraft register data files
    • Registration marks
    • Irrevocable deregistration and export request authorisation
    • Aircraft registration frequently asked questions
    • Contact the civil aircraft register
    • Import and register foreign aircraft
    • Regulations - CASR Part 47
  • Foreign operators
    • Additional Requirements
    • Foreign air transport air operators certificate
    • Non-Scheduled Flight Permission
    • Section 27(A) Permission
  • Fuel
  • Sport aviation
    • Amateur built and experimental aircraft
    • CASA’s role in sport aviation
    • Gliding
    • Gyroplanes
    • Hang gliders and paragliders
    • Parachuting
    • Recreational ballooning
    • Recreational unmanned aircraft (including models and drones)
    • Ultralight and weightshift microlight aircraft
    • Warbirds
  • Drones
    • The rules
    • Drone registration
    • Drone safety apps
    • Flying for fun
    • Remote pilot licence
    • Remotely piloted aircraft operator's certificate
    • Training and education
    • Industry initiatives
    • Official documents and forms
    • Report unsafe drone operations
Go to top of page

Airworthiness Advisory Circulars - Part 6-74 - Removal of Inoperative Equipment

Part 6 - General advice

AAC 6-74

Removal of Inoperative Equipment

5/99

There seems to be a misunderstanding that inoperative equipment included in an aircraft's approved minimum equipment list (MEL), or approved as permissible unserviceabilities under CAR 37, can be removed for repair while the aircraft continues in operation.

However, MEL or CAR 37 approvals do not automatically allow operations with equipment removed. Removals of equipment from an aircraft are modifications and hence must be carried out in accordance with CAR 42U. The regulation applies to all equipment related to the airworthiness of the aircraft, including optional equipment not required by the type design standards or operational rules. This requirement is necessary for safe operations of the aircraft, as improper removals may have adverse effects on the aircraft weight and balance or operations of other critical aircraft systems.

Therefore, unless the design of a removal is specified in the aircraft's approved maintenance data, it must be approved by a CAR 35 authorised person. Approved maintenance data is defined in CAR 2A and includes the manufacturer's maintenance manual, the master minimum equipment list for the aircraft type, and instructions issued by the CAR 35 authorised person who approved the design and installation of an optional equipment.

Once the design of the removal has been approved, an operator can include the procedures for removing the equipment in the maintenance (M) procedures for the aircraft's MEL.

Last modified: 10 May 2017
Share this Share on facebook Share on twitter
Back to top

Site information

  • Accessibility
  • Copyright
  • Privacy
  • Freedom of Information

Resources

  • Acronyms and abbreviations
  • Online store
  • Forms and templates
  • Media hub
  • Regulatory philosophy
  • Manuals and handbooks

Our other sites

  • Consultation Hub
  • Know your drone
  • Flight Safety Australia
  • Out-n-Back
  • Visual Flight Rules Guide

Download our app

  • Can I pack that?

Stay in touch

  • Phone: 131 757
  • Subscribe
  • Contact us

Facebook Twitter Linkedin Youtube RSS feed

View full site

View mobile site