Part V - Standard 571 - Types of Work

Canadian Aviation Regulations (CARs) 2019-1

Types of Work
(amended 2010/12/30; )
(refer to section 571.10 of the standard)
Types Of Work Applicable Standards Of Airworthiness
(a) Work for which a personal qualification or training standard has been established. That the work has been performed by a person who holds the personal qualifications or training standards, required by subsection 571.02(3) of the CARs.
(b) Specialized Maintenance That the work was performed under the control of an organisation approved for the applicable category pursuant to section 571.04 of the CARs.
(amended 2002/09/01)

(c) Nondestructive Testing (NDT)

Information Note:

Where NDT has been performed, but where the inspection findings have not yet been assessed against the published limits, a maintenance release shall not be signed in respect to the NDT requirement.  Hence, a maintenance release is only required where disassembly and reassembly were involved to provide the access necessary for the inspection.

That the inspection findings have been analysed and any defect or discontinuity noted in the inspection findings, supplied by the person performing the NDT, is within the manufacturer's published limits for that aeronautical product.
(d) Work that disturbs engine or flight controls

That the system has been inspected for correct assembly and correct locking of any parts disturbed by the maintenance performed, including an operational check for proper sense and range of motion of the engine or flight controls has been accomplished, by at least two persons, and the technical record contains the signatures of both persons.
(amended 2010/12/30)

Information Note:

One of the signatures required by this section may be that of the person who has signed the maintenance release.

(e) Functional, Operational or other Ground Test
(i.e. Where specified in the quality procedures of the organization performing the work, or where the person signing the maintenance release determines that a functional, operational, or other ground test is required to verify satisfactory completion of the work).
A test shall be performed prior to signing a maintenance release or conditional maintenance release, demonstrating that the aeronautical product is functioning in accordance with the applicable design standards.

(f) Test Flights &Conditional Maintenance Releases
(i.e. Where specified in the quality procedures of the organisation performing the work, or where the person signing the maintenance release determines that a test flight is required to verify the system operation).

Information Note:

Conditional Maintenance Releases are not to be used in those instances where maintenance personnel require additional information as to system operation or other operational characteristics (e.g. report on the range of a navigational system, cabin temperature control, etc.)

  1. (i) That all applicable ground testing has been satisfactorily completed; and,

  2. (ii) That the Journey Log provides details which describe the verification test required by the pilot, including any specific test requirements.

Information Note:

Subsection 605.85(3) of the CARs addresses the pilot's requirements for log entries following a test flight.

(g) Maintenance performed with respect to an Airworthiness Directive (AD).
  1. That the record made with respect to the AD includes:

    (i) the identification code or number used by the issuing authority for that AD (where an organisation uses internal document bearing an alternative identification code or a number to control the compliance with the requirements of an AD, that number must also be shown in the maintenance release);

  2. (ii) where the AD specifies alternative requirements, the identification of the alternative used;

  3. (iii) where the AD is a multi-part AD, the identification of the parts of the directive that have been complied with; and,

  4. (iv) where an AD requires an inspection, the findings resulting from that inspection have been noted in the technical record.

(h) Weight & Balance (W&B):

  1. (i) Change to empty weight or centre of gravity (C of G) position, including lateral C of G where limitations are published;

  2. (ii) W&B Report.

  1. (i) The revised empty weight and C of G position shall be calculated, and the weight & balance report, established pursuant to section 605.92 of the CARs shall be reissued or amended.

  2. (ii) The report meets the standards established in conformity with section 571.10 of the CARs and contained in Appendix C.

(i) Opening &Closing Pressure Systems (positive or negative pressure), other than opening by means of

  • - a quick-disconnect,
  • - a self-sealing drain valve;
  • - an oil or fuel fill/servicing cap
  1. (i) The pressure system is tested, inspected, and found to be properly connected and within leakage tolerances specified in the regulations, standards, or the aeronautical product manufacturer's specifications, as applicable; and,

  2. (ii) Where the work is performed on an altimeter or pitot-static system, the leak check outlined in Appendix B shall be complied with in conformity with section 571.10 of the CARs.

Information Note:

In the case of the pitot-static system, only a leak check is required at this time. The full calibration cycle tabled in Appendix B is only required at the 2 year interval tabled in the Aircraft Equipment and Maintenance Standards (625).

(j) Work affecting performance of a Magnetic Direction Indicator (MDI), including installation of a replacement indicator. The MDI shall be calibrated and, in the case of non-stabilised direction magnetic compasses, a new correction card installed.
(k) Propeller Inspection The standards of airworthiness specified in Appendix D shall be complied with in accordance with section 571.10 of the CARs.
(l) Wooden Component Inspection
(excluding wooden propeller)
The standards of airworthiness specified in Appendix E shall be complied with in accordance with section 571.10 of the CARs.
(m) Work affecting performance of Transponder or Altitude Reporting Systems The standards of airworthiness specified in Appendix F shall be complied with in accordance with section 571.10 of the CARs.
(n) Work affecting performance of Emergency Locator Transmitter (ELT) The standards of airworthiness specified in Appendix G shall be complied with in accordance with section 571.10 of the CARs.
(o) Cockpit Voice Recorder (CVR) &Underwater Locator Device (ULD) Maintenance The standards of airworthiness as specified in Standard 625 Appendix C.
(amended 2007/12/30)
(p) Flight Data Recorder (FDR) &Underwater Locator Device (ULD) Maintenance The standards of airworthiness as specified in Standard 625 Appendix C.
(amended 2007/12/30)
(q) Recurring Defect Rectification The person signing the Maintenance Release has reviewed the methodology used in previous repair attempts, to determine if the current rectification methodology is appropriate.
(r) Cycles, landings or hours since new of a life-limited part. The cycles, landings or hours recorded on the maintenance release represent the total accumulated cycles, landings or hours since the time of manufacture of the part.
(s) Cockpit Voice Recorder intelligibility check.

A test procedure shall be established which, when completed under operational conditions, will enable verification of intelligible recorded audio information from all the various input sources required by the regulations:

  1. (i) at intervals specified in the applicable maintenance standards; or,

  2. (ii) upon initial installation.

Information Notes:

  1. i) Care must be exercised when determining running hours. Some systems are such that the CVR is on at any time power is applied to the aircraft; in this case the factor identified in the manufacturer's specifications shall be applied to determine the running time. As an example, one CVR manufacturer recommended a factor of 1. 7 times flight hours. Where no factor is provided, each installation will have to be evaluated individually paying due regard to such details as running time meters, etc.

  2. (ii) The escalation of the maintenance times is permitted when proposed as an amendment to an air operator's maintenance schedule and when substantiated with reliability statistics.

(t) Work affecting static ports, pitot tubes and flight control surfaces.
(amended 1998/06/01)
That the work has been performed and inspected to ensure:
  • - critical sensors such as static ports or pitot tubes, which may affect aircraft flight characteristics, are not blocked;

  • - movement of flight control surfaces is not impeded.
    (amended 1998/06/01)

Any installation of control locks, gear pins, static port covers and pitot tube covers are to be marked, or identified, by a high visibility colour, and that warning flag has been securely attached.
(amended 1998/06/01)

(u) Certification of undocumented parts.
(amended 2002/03/01)
That the work has been performed under the control of an approved maintenance organization holding a certificate that specifies the applicable category for which pertinent ratings have been issued, indicated in section 573.02 of Standard 573, in accordance with the process outlined in Appendix H of this standard.
(amended 2002/03/01)
(v) Liquid penetrant inspection.
(amended 2002/09/01)
ASTM E 1417 - Standard Practice for Liquid Penetrant Examination.
(amended 2002/09/01)
(w) Hydrostatic testing of pressure vessels.
(amended 2002/09/01)
National Standards of Canada:
CAN/CSA B339-96; and
CAN/CSA B340-97
Testing to be performed in accordance with the Canadian Standards listed herein by a Canadian organization approved under the Transportation of Dangerous Goods - Regulations.
(amended 2002/09/01)