Relevant Regulations / Policy / Background

CAR 4b.115, Accelerate-Stop Distance

An autofeather system aids in mitigating airplane control difficulties inherent with reacting to an engine failure, and thereby results in shorter required accelerate-stop distances than if no autofeather system was present. No crew action to shut down an engine or manually feather a propeller is allowed in response to an engine/propeller failure during takeoff.

CAR 4b.116, Takeoff Path

An autofeather system following an engine failure moves the propeller to its lowest drag blade angle. The drag reduction associated with autofeathering mitigates potential control difficulties induced by a windmilling propeller, and also allows increased engine-out climb performance when compared to a non-feathered propeller.

CAR 4b.120, One Engine Inoperative Climb

An autofeather system allows the drag benefits associated with a feathered propeller to be extended to the climb performance for the entire takeoff profile.

The text of the applicable regulations can be viewed at the following link (CAR 4b Regs). The included regulations are from CAM 4b, which includes interpretive and policy material embedded within the applicable regulations. The regulations themselves, however, are the applicable CAR 4b regulations.

CAR 13 Subpart C, Turbine Engines

CAR 13.200, Design and Construction

Within the original CAR 13 requirements for turbine engines, while the regulations did not allow any hazardous or unreliable features, there were no specific regulations regarding birds, bird strikes, or bird ingestion.

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