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Commercial and Business Aviation Advisory Circulars |
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Reporting Aircraft Defects and UnserviceabilitiesINTRODUCTION This Air Carrier Advisory Circular (ACAC) is intended to provide guidance to air operators and pilots regarding the procedures for reporting aircraft defects and unserviceabilities. This revision reflects a correction to the French translation. REFERENCE Canadian Aviation Regulations (CARs), Part VI, General Operating and Flight Rules, Subpart 5 (CAR 605), and Commercial Air Services Standards 625.09 & 625.10. BACKGROUND Inspections have determined that pilots too often do not record aircraft defects and unserviceabilities in the aircrafts journey log as required by regulation. This likely, may be attributed, among other reasons, to the mistaken assumption that such entries in the journey log will always automatically ground the aircraft. The Canadian Aviation Regulations (CARs), implemented on October 10, 1996, outline in detail the requirements and procedures for reporting all aircraft defects and unserviceabilities. These regulations allow for the safe deferral of maintenance in certain cases. DETAILS CAR 605 states that the particulars of any defect in any part of an aircraft or its equipment shall be entered into the aircraft journey log as soon as practicable after the defect has been discovered but, at the latest, before the next flight. Any action subsequent to entering the defect in the journey log will normally depend upon whether the aircraft is subject to a Minimum Equipment List (MEL). For ease of reference and to assist operators and pilots to determine the appropriate action to be taken after a defect has been entered in the journey log, the appropriate regulations as well as certain provisions from the standards have been paraphrased for inclusion in this ACAC: Aircraft with a Minimum Equipment List Once a defect has been entered in the journey log of an aircraft with a MEL, the following procedures will apply:
Aircraft without a Minimum Equipment List Once a defect has been entered in the journey log of an aircraft without a MEL, the following procedures will apply:
Provisions Regulations require that a formal system be established to control aircraft defects. Such a system will ensure that the airworthiness effects of aircraft defects and unserviceabilities have been assessed and that there will be consistent application of the airworthiness standards. The type of system used to control the deferral of repairs to defects and unserviceabilities will depend upon the type, size and complexity of the operators aircraft fleet. Although more complex operations will utilize a MEL, all operators must have an approved system, and this system must be detailed in the operators maintenance control manual (MCM). Compliance with the procedures outlined in the approved MCM is mandatory. The final decision rests with the pilot-in-command to accept an aircraft for flight. A pilot can accept an aircraft with defects where the repair of these defects has been deferred in accordance with an approved system. However, a pilot who undertakes a flight in an aircraft that is not approved defect deferral system will be in contravention of the applicable CARs. CONCLUSION The ultimate responsibility for determining whether an aircraft may be operated with outstanding defects rests with the pilot-in-command. Accordingly, the CARs require that full details of all defects and unserviceabilities be recorded in the aircraft journey log. Only when such entries have been made in the journey log can the pilot-in-command be fully aware of the condition of the aircraft and make the correct decision concerning the intended flight.
A.J. LaFlamme
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