Sign-off After an Unrecorded Repair
A Transport Canada–licensed AME at a small Part 702 aerial-work operator is asked to release a Bell 206B after a tail-rotor drive-shaft coupling replacement. The work was done two days earlier by a contractor who has since left; the coupling was installed correctly, but the journey log shows only a line entry with no reference to the task, no certification, and no parts traceability tag. The AME has personally inspected the coupling, confirmed torque values against the maintenance manual, and verified the part number against the illustrated parts catalogue. The aircraft is scheduled for a fire-suppression charter in six hours. The operator's maintenance control manual states that all maintenance must be recorded and certified before return to service, and the AME holds the appropriate type rating.
1. Can the AME certify the aircraft for return to service based on his own inspection? Explain the regulatory reasoning and the specific records problem.
Read the worked answer
The AME must not simply sign a release as if he had performed the work. Under the Canadian Aviation Regulations, maintenance must be performed and certified in accordance with the applicable standards, and the certification of return to service is a statement that the work was performed in accordance with the required standards and recorded. Here the work exists but the record does not. Signing off the coupling as if he installed it would be a false certification of performance, which is a serious breach and potentially an enforcement matter.
The correct path is to treat the coupling as an unknown-history installation. The AME can perform a conformity inspection and, if the maintenance manual permits, re-certify the installation as a new maintenance action - recording the inspection, the torque verification, the part number, and the basis for acceptance. The parts traceability gap must be resolved: without a tag or an equivalent record establishing the part's airworthiness, the coupling cannot be accepted, and the part should be replaced with a traceable unit. Only after the record is complete can a return-to-service certification be made. The six-hour deadline is irrelevant to the airworthiness decision.
2. The operator pressures the AME to 'just sign it, the part is obviously fine.' What options and obligations does the AME have?
Read the worked answer
The AME's obligation is to the standards, not the schedule. If the record cannot be made compliant, the AME should decline to certify and document why. Options include: performing a compliant re-installation with a traceable part and full recording; escalating to the person responsible for maintenance, who is accountable for the maintenance control system; and refusing the flight if the aircraft cannot be lawfully released.
Pressure to sign an inaccurate record is itself a reportable safety concern. The AME should make a written note of the request, since a certification made under pressure that misstates the facts exposes the AME to licence action and the operator to enforcement. The AME may also raise the issue through the operator's safety management system or, if unresolved, to the regulator. The professional answer is that a delayed charter is a commercial problem, while an uncertified repair is an airworthiness problem, and only the latter can ground the aircraft.