Developed by ICAO, the International Standards and Recommended Practices (SARPS) contained in the nineteen Technical Annexes to the Convention on International Civil Aviation (also called Chicago Convention) are applied universally and produce a high degree of technical uniformity which has enabled international civil aviation to develop in a safe, orderly and efficient manner.


Airworthiness is the measure of an aircraft's suitability for safe flight.

A standard of airworthiness is initially demonstrated by a Certificate of Airworthiness from a national aviation authority, and remains valid by complying to the required Instructions For Continuing Airworthiness.

The application of airworthiness defines the condition of an aircraft and supplies the basis for judgement of the suitability for flight of that aircraft, in that it has been designed with engineering rigour, constructed, maintained and is expected to be operated to approved standards and limitations, by competent and approved individuals, who are acting as members of an approved organization and whose work is both certified as correct and accepted on behalf of the State.

A specific contact who will be responsible for the airworthiness of the aircraft will be required. Further information on the role of Nominated Airworthiness Technical Representative (NATR) can be found on Form 31 Airworthiness Contact Information.

The Operator should countersign Form 31 to confirm the nominated individual is competent to carry out the tasks of NATR, however the responsibility of Aircraft Airworthiness is understood to remain with the Operator.

This person should be available to the IOMAR during the registration process, they should also provide the information required in Form 3 Application for a Certificate of Airworthiness, and also Form 100 Aircraft Maintenance Programme Approval Application.


The NATR will be the single point of contact for all matters of airworthiness for the Operator to the IOMAR.

It should be noted that at this time, Base Maintenance can only be certified by an EASA Part 145 maintenance organisation, EASA Part M SubPart F Organisation or approved IOM Aircraft Maintenance Organisation.

Line maintenance whether scheduled, or defect rectification can also be certified by an IOMAR Validated Licensed Engineer or IOMAR Authorised person.

The NATR is required to review all documents (work packs, tech log pages etc) that have a Certificate of Release to Service (CRS), within 30 days of receipt of the documents. This is to ensure an accurate and therefore valid CRS has been made following the wording contained in Registry Publication 5 Acceptable Means of Compliance (AMC) Airworthiness Requirements.

IOMAR Senior Airworthiness Surveyors may contact the NATR on receipt of Form 31, to discuss the above information

Aircraft can only operate under 2 scenarios, either with a valid Certificate of Airworthiness (CoA) or a Permit to Fly (PtF).

To obtain the issuance of a CoA, the aircraft and its technical record documents must be presented by your Nominated Airworthiness Technical Representative (NATR) to one of the Isle of Man Aircraft Registry (IOMAR) Airworthiness Surveyors for an airworthiness survey. 

Prior to requesting an airworthiness survey of the aircraft and its technical records, the Operator (NATR) must have completed their own inspection of the aircraft and records and satisfied themselves that they are in a position to demonstrate that each of the applicable items on this preparation document has reached a full level of compliance and when appropriate, providing documents if requested by the airworthiness surveyor. If there are any items about which you are unsure or cannot satisfy, please contact the Aircraft Registry or the assigned Surveyor in advance of the survey to discuss a possible resolution.



The NATR will present the aircraft and it's technical records to the IOMAR Airworthiness Surveyor on a pre-arranged survey date and location. The survey is undertaken with the intention of making a recommendation for a CoA to be issued so that the aircraft may operate as soon as possible afterwards, assuming all operational requirements and approvals have been met.

For an initial survey the survey will follow the format of Registry Publication 7 Preparation Requirements for Certificate of Airworthiness (CoA) Initial Issue. To apply for an initial CoA survey please complete Form 3 Survey Application for the Initial Issue of a Certificate of Airworthiness (CoA).

A renewal survey will follow the format of Registry Publication 17 Preparation Requirements for Certificate of Airworthiness (CoA) Renewal Survey. To apply for a renewal CoA survey please complete Form 9 Survey Application for the Initial Issue of a Certificate of Airworthiness (CoA).

For a survey with no RP7 or RP17 findings, the Surveyor will submit a recommendation to the IoMAR that a standard has been achieved to issue a CoA. (Note - for initial CoA surveys IOMAR will confirm whether all registration requirements have been satisfied). At the conclusion of a satisfactory initial survey, the IOMAR will issue by email the Certificate of Registration and Certificate of Airworthiness in digital format to the Registered Owner, Operator, FOR and NATR.

The digital certificates are rendered valid as the original documents in their digital form by IOMAR. They satisfy the on-board carriage requirements for aircraft engaged in international air navigation in accordance with Articles 29 and 31 of the Convention on International Civil Aviation as well as the requirements of Annex 7 and 8 to the same Convention.

The certificates may be carried using a portable electronic device (PED), or if the aircraft has approval, an Electronic Flight Bag (EFB)

Aircraft can only operate under 2 scenarios, either with a valid Certificate of Airworthiness (CoA) or a Permit to Fly (PtF).

There may be occasions when the aircraft becomes un-airworthy and the CoA becomes invalid , and in some situations the CoA cannot be restored at the location the aircraft is at.

In this situation, please read the Permit to Fly section in Registry Publication 9 Airworthiness Management Information and then telephone our Airworthiness section on +44 (0)1624 682358 to discuss your requirements.

Following this discussion you may be advised to complete Form 42 Application for the Issue of a Permit to Fly.

Prior to your first flight you must have an Approved Maintenance Programme - guidance and instructions for this can be found within Registry Publication 11 Aircraft Maintenance Programme Guidance and Instructions, and is applied for by completing Form 100 Application for an Aircraft Maintenance Programme (AMP) Approval.

Upon satisfactory level of review, an Approved Maintenance Programme Certificate will be issued by the Registry.

Any subsequent changes to your Maintenance Programme must be detailed on Form 101 Change of Details of Aircraft Maintenance Programme Approval and submitted to the Registry.

The content of Form 100 / 101 and all documents cross referenced from it must be in compliance for the aircraft to be considered airworthy.

The aircraft owner/operator must inform the Aircraft Registry of their Nominated Airworthiness Technical Representative (NATR) who will manage the aircraft continuing airworthiness including the compilation of the requirements of the Maintenance Control Manual

Please complete Form 31 Airworthiness Contact Information to nominate this individual.

It is possible to have a qualified and current maintenance engineer (holding a maintenance certification issued by an ICAO compliant State) license/certificate validated to enable them to conduct 'line maintenance and defect rectification'.  

Please complete Form 7 Application for Maintenance Engineer Licence Validation to apply for this validation.

Modification and repair data provided by the Type Certificate Holder, Supplemental Type Certificate Holder or Design organisation and/or those approved under the regulations of the state of design, will be acceptable without further showing.  EASA Part 21 design data is also acceptable.  Please see Registry Publication 5, AMC 17 for information.

If your modification falls outside of the groups above, then the NATR may apply for our modification approval using Form 35 Application for Approval of a Modification.

For the purpose of this web page any reference to ‘the Department’ is a reference to the Isle of Man Aircraft Registry, Department for Enterprise of the Isle of Man Government.


This page identifies the Airworthiness Directives that are applicable to aircraft entered on the Isle of Man Aircraft Register in accordance with the requirements of the Air Navigation (Isle of Man) Order 2015 Article 17 (1) (d).


For the purposes of Article 17 (1) (d), ‘made mandatory by the Department’ includes Airworthiness Directives (ADs), issued by the State of TCDS compliance for the Aircraft, Engine, Propeller or Component.

The Department may from time to time issue Additional Airworthiness Directives (AAD) to address an urgent safety concern.

The Department may vary the requirements of AD’s issued by the State of TCDS compliance, and issue its own AAD. In this case the AAD will take precedence over the original AD.

With the exception of Isle of Man Additional Airworthiness Directives, the Isle of Man Aircraft Registry will not notify owners of the issue of Airworthiness Directives. Therefore owners or their nominated representatives will be responsible for monitoring applicable publications/websites for the issue of Directives affecting their aircraft.

Registration with the respective State of TC compliance for automated notification of AD issues should be carried out.


Aircraft, engine and propeller log books required by Article 29 should be updated to record Airworthiness Directive compliance, including the means of compliance where options exist. Entries relating to any phased termination permitted by Directives should be clearly recorded to ensure adequate control. Entries should additionally be made for generally applicable Directives non-applicable to particular aircraft, engine, propellers, equipment, including the reason for non-applicability.

Isle of Man Additional Airworthiness Directives (AAD)

None issued at this time.