Ops Spec A041 gives authorization for a pretakeoff contamination check. What is this and where does a pilot find out more information about it?

• A. It is a visual and tactile inspection conducted within 5 minutes prior to takeoff in icing conditions, is used to reasonably ensure that critical surfaces of the aircraft are free from frost, ice or snow. More information is found in the Operations Manual sections 9, Flight Operations, and section 10 Weather, which gives more detailed instructions on what is required for the Pretakeoff Contamination Check.
• B. It is a fuel contamination check and is detailed in the MEL.
• C. It is a check of navigation systems for accuracy; see the Flight Manual.
• D. It is a visual inspection of cabin interior; see emergency procedures.

Answer: (A)

The concept being tested is the pretakeoff contamination check, a procedure required when icing conditions could affect flight performance. This check is a visual and tactile inspection conducted within five minutes before takeoff to ensure that critical surfaces are free from frost, ice, or snow. Keeping these surfaces clean is essential because contamination on wings, tail surfaces, and other areas can disrupt airflow, reduce lift, or alter control effectiveness, which can jeopardize takeoff safety.

Where to find more information: pilots and operators refer to Ops Spec A041 for the authorization and the specific requirement. Detailed procedures, definitions of what counts as contamination, time windows, and what actions to take if contamination is found are located in the Operations Manual, specifically Flight Operations (Section 9) and Weather (Section 10). These sections lay out exactly how to perform the check, what surfaces to inspect, and how to determine when it’s safe to proceed with takeoff.