Carbon monoxide safety awareness survey (maintenance engineers)

Closed 25 Feb 2024

Opened 15 Feb 2024

Results updated 7 Mar 2024

The survey has now closed.

Thank you to those who provided input into the carbon monoxide safety awareness survey (maintenance engineers) survey.

We asked

We sought industry feedback via an online survey about the prevalence of carbon monoxide detector use and knowledge among maintenance engineers during routine maintenance checks.  

You said

We received 46 responses to the survey.

Summary of the results:

  • 58% stated they, or their maintenance organisation, have documented steps in place for checking for carbon monoxide leaks.
  • 15% reported they check for CO leaks every time they remove or install parts that form an engine firewall, while 33% say they never check for CO leak points during this process.
  • Of the those who use a CO detector, 57% use the stick-on (passive) variety as the only means of checking for potential leaks, and 32% use electronic (active) detectors before signing off on a maintenance report.

Next steps

Over the coming months, we will roll out a suite of safety education materials that aim to encourage uptake of electronic (active) carbon monoxide detectors during maintenance checks, as well as raising general awareness of the impacts to human health from CO exposure.

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Are you a maintenance engineer who works on piston engine aircraft?

If so, we want to hear from you!

CASA is launching a safety education campaign focusing on carbon monoxide (CO) awareness in piston engine aircraft, targeting pilots and maintenance personnel.

To support the campaign, we invite you to participate in a 5 minute online survey that asks about your knowledge of carbon monoxide, and the processes you undertake to identify CO leaks during scheduled maintenance periods.

Have your say by 25 February 2024.

Why your views matter

Your feedback will help us develop resources to support safety regarding carbon monoxide exposure risks for maintenance engineers and pilots during flight.  


  • Engineers


  • Airworthiness / maintenance
  • Hazards
  • Safety promotion