Learn more about the maintenance of warbirds, historical and replica aircraft under the proposed general aviation maintenance regulations (Part 43 of the Civil Aviation Safety Regulations 1998 (CASR) and the Part 43 Manual of Standards (MOS)).
Who should read this?
- Registered operators of WHR aircraft
- Maintainers of WHR aircraft:
- licensed aircraft maintenance engineers
- holders of an authorisation under regulation 33B, 33D or subregulation 42ZC (6) of the Civil Aviation Regulations 1988 (CAR) or Civil Aviation Order 100.4
- Part 145 maintenance organisation
- holders of an aircraft maintenance technician certificate 5
- pilots of WHR aircraft.
A WHR aircraft is a warbird, historic or replica aircraft issued with a special certificate of airworthiness for a limited category aircraft under regulation 21.189 of CASR or an experimental certificate for a purpose mentioned in paragraph 21.191 (d) or (e) of CASR.
WHR aircraft is defined in the Dictionary to the Part 43 (Maintenance of Aircraft) Manual of Standards 2021 (the Part 43 MOS).
This information sheet relates only to WHR aircraft issued with a special certificate of airworthiness for a limited category aircraft (a limited category WHR aircraft). (A WHR aircraft issued with an experimental certificate must be maintained and inspected in accordance with conditions imposed on its certificate under regulation 21.195A of CASR.)
The administering authority (AA) for a limited category aircraft is an organisation approved by CASA under regulation 262AN of the Civil Aviation Regulations 1988 (CAR) to perform functions in relation to limited category aircraft. These functions relate to the operation and maintenance of aircraft. If no organisation has been approved to administer the relevant type of limited category aircraft, CASA is the AA for the aircraft.
Responsibilities of the registered operator
The registered operator (RO) of a limited category WHR aircraft must ensure the aircraft is inspected in accordance with an inspection schedule for the aircraft that has been approved by the AA for the aircraft.
The inspection schedule may be a schedule developed by the manufacturer, a person in the armed force of any country that used the aircraft, or the owner of the aircraft. The inspection schedule may require the use of a checklist based on Schedule 1, if the administering authority approving the schedule considers this appropriate for the aircraft.
The RO must not permit the aircraft to be flown except under a special flight permit if:
- an inspection required under Part 43 has not been completed
- a major defect has not been rectified
- a safety direction issued by the AA has not been complied with
- a safety direction issued by CASA has not been complied with.
Note: Further requirements apply with regard to adventure flights and flights over populous areas. For further information refer to CASR Part 132, the Part 132 Manual of Standards and CASA advisory circular AC 132-01 v1.1 - available from the CASA website.
Approving a limited category WHR aircraft for return to service after an inspection
A limited category WHR aircraft can be approved for return to service after inspection by:
- a holder of an AMTC5 that permits the maintenance
- a LAME with appropriate licence coverage
- an AMO whose approval rating permits the maintenance.
The format of an approval for return to service
Return to service after a scheduled inspection
A person approving an aircraft for return to service after a scheduled inspection must make a record in the aircraft maintenance records system which includes the following wording:
"I certify that the aircraft VH-*** has been inspected in accordance with [insert kind of inspection], determined to be airworthy and is approved for return to service.
A list of deferrable defects, dated [insert date of list], was provided to the registered operator of the aircraft on [insert date]"]."**
***insert aircraft registration number
** omit this sentence relating to deferrable defects if none are identified
Authorisation type and number:
The person must also include in the record the information required in subsection 4.16 (2) of the draft MOS.
Approval of the aircraft for return to service after maintenance
A person who performs maintenance on an aircraft or aeronautical product for the aircraft must make an entry in the maintenance record of that aircraft or aeronautical product containing the following information:
- a description of the maintenance carried out
- the date of completion of the maintenance carried out
- particulars of each person who carried out the maintenance, including their ARN (if any)
- the signature, ARN and kind of licence or certificate held by the person certifying the maintenance carried out.
Note: The signature constitutes the approval for return to service only for the work performed.
The aircraft maintenance technician certificate
An aircraft maintenance technician certificate (AMTC 5) is issued to an individual by the AA for the aircraft. It permits the holder to perform or supervise maintenance that is specified on the certificate in relation to a limited category WHR aircraft to which the certificate applies, and to release the aircraft to service after maintenance.
Requirements for issue of an AMTC5
To be eligible for an AMTC5 a person must:
- be at least 18 years of age
- have either:
- at least 18 months of practical experience in the procedures, practices, inspection methods, materials, tools, machine tools, and equipment generally used in the maintenance duties of the specific job or aircraft for which the person is to be certificated, or
- completed training, approved by the AA for the aircraft, that is designed to qualify the person to carry out maintenance on the WHR aircraft to which the certificate will apply; and
- be able to read, write, speak and understand the English language.
The content provided in the information sheet is a guide only as to how the rules may work in practice once the Part 43 MOS is made and commences.