Federal Aviation Regulations (FAR) 135 Oral Practice Test

The pretakeoff contamination check is a flight operations procedure, and the most detailed, official instructions for it come from the operator’s own procedures. The Operations Manual is where the company documents step-by-step preflight checks, including how to perform a contamination check, acceptable criteria, and what actions to take if contamination is found. Sections 9 and 10 are the parts of that manual that cover these specific preflight procedures.

The Aircraft Maintenance Manual focuses on how systems are serviced and maintained, not the step-by-step preflight checks you perform before flight. Pilot’s personal notes aren’t an approved source and can be out of date, while a flight plan is about route, fuel, weights, and weather planning rather than contamination inspection procedures.